diff --git a/data/googleplaystore.csv b/your-code/notebooks/data/googleplaystore.csv
old mode 100755
new mode 100644
similarity index 100%
rename from data/googleplaystore.csv
rename to your-code/notebooks/data/googleplaystore.csv
diff --git a/data/googleplaystore_user_reviews.csv b/your-code/notebooks/data/googleplaystore_user_reviews.csv
old mode 100755
new mode 100644
similarity index 100%
rename from data/googleplaystore_user_reviews.csv
rename to your-code/notebooks/data/googleplaystore_user_reviews.csv
diff --git a/your-code/notebooks/main.ipynb b/your-code/notebooks/main.ipynb
index 07928c1..7fa1820 100755
--- a/your-code/notebooks/main.ipynb
+++ b/your-code/notebooks/main.ipynb
@@ -12,7 +12,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -60,11 +60,169 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>App</th>\n",
+       "      <th>Category</th>\n",
+       "      <th>Rating</th>\n",
+       "      <th>Reviews</th>\n",
+       "      <th>Size</th>\n",
+       "      <th>Installs</th>\n",
+       "      <th>Type</th>\n",
+       "      <th>Price</th>\n",
+       "      <th>Content Rating</th>\n",
+       "      <th>Genres</th>\n",
+       "      <th>Last Updated</th>\n",
+       "      <th>Current Ver</th>\n",
+       "      <th>Android Ver</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>Photo Editor &amp; Candy Camera &amp; Grid &amp; ScrapBook</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.1</td>\n",
+       "      <td>159</td>\n",
+       "      <td>19M</td>\n",
+       "      <td>10,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>January 7, 2018</td>\n",
+       "      <td>1.0.0</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>Coloring book moana</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>3.9</td>\n",
+       "      <td>967</td>\n",
+       "      <td>14M</td>\n",
+       "      <td>500,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design;Pretend Play</td>\n",
+       "      <td>January 15, 2018</td>\n",
+       "      <td>2.0.0</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>U Launcher Lite – FREE Live Cool Themes, Hide ...</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.7</td>\n",
+       "      <td>87510</td>\n",
+       "      <td>8.7M</td>\n",
+       "      <td>5,000,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>August 1, 2018</td>\n",
+       "      <td>1.2.4</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>Sketch - Draw &amp; Paint</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>215644</td>\n",
+       "      <td>25M</td>\n",
+       "      <td>50,000,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Teen</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>June 8, 2018</td>\n",
+       "      <td>Varies with device</td>\n",
+       "      <td>4.2 and up</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>Pixel Draw - Number Art Coloring Book</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.3</td>\n",
+       "      <td>967</td>\n",
+       "      <td>2.8M</td>\n",
+       "      <td>100,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design;Creativity</td>\n",
+       "      <td>June 20, 2018</td>\n",
+       "      <td>1.1</td>\n",
+       "      <td>4.4 and up</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                                                 App        Category  Rating  \\\n",
+       "0     Photo Editor & Candy Camera & Grid & ScrapBook  ART_AND_DESIGN     4.1   \n",
+       "1                                Coloring book moana  ART_AND_DESIGN     3.9   \n",
+       "2  U Launcher Lite – FREE Live Cool Themes, Hide ...  ART_AND_DESIGN     4.7   \n",
+       "3                              Sketch - Draw & Paint  ART_AND_DESIGN     4.5   \n",
+       "4              Pixel Draw - Number Art Coloring Book  ART_AND_DESIGN     4.3   \n",
+       "\n",
+       "  Reviews  Size     Installs  Type Price Content Rating  \\\n",
+       "0     159   19M      10,000+  Free     0       Everyone   \n",
+       "1     967   14M     500,000+  Free     0       Everyone   \n",
+       "2   87510  8.7M   5,000,000+  Free     0       Everyone   \n",
+       "3  215644   25M  50,000,000+  Free     0           Teen   \n",
+       "4     967  2.8M     100,000+  Free     0       Everyone   \n",
+       "\n",
+       "                      Genres      Last Updated         Current Ver  \\\n",
+       "0               Art & Design   January 7, 2018               1.0.0   \n",
+       "1  Art & Design;Pretend Play  January 15, 2018               2.0.0   \n",
+       "2               Art & Design    August 1, 2018               1.2.4   \n",
+       "3               Art & Design      June 8, 2018  Varies with device   \n",
+       "4    Art & Design;Creativity     June 20, 2018                 1.1   \n",
+       "\n",
+       "    Android Ver  \n",
+       "0  4.0.3 and up  \n",
+       "1  4.0.3 and up  \n",
+       "2  4.0.3 and up  \n",
+       "3    4.2 and up  \n",
+       "4    4.4 and up  "
+      ]
+     },
+     "execution_count": 8,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google_play = pd.read_csv(\"data\\googleplaystore.csv\")\n",
+    "google_play.head()"
    ]
   },
   {
@@ -76,11 +234,36 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "App                object\n",
+       "Category           object\n",
+       "Rating            float64\n",
+       "Reviews            object\n",
+       "Size               object\n",
+       "Installs           object\n",
+       "Type               object\n",
+       "Price              object\n",
+       "Content Rating     object\n",
+       "Genres             object\n",
+       "Last Updated       object\n",
+       "Current Ver        object\n",
+       "Android Ver        object\n",
+       "dtype: object"
+      ]
+     },
+     "execution_count": 7,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google_play.dtypes"
    ]
   },
   {
@@ -92,11 +275,169 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 10,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>App</th>\n",
+       "      <th>Category</th>\n",
+       "      <th>Rating</th>\n",
+       "      <th>Reviews</th>\n",
+       "      <th>Size</th>\n",
+       "      <th>Installs</th>\n",
+       "      <th>Type</th>\n",
+       "      <th>Price</th>\n",
+       "      <th>Content Rating</th>\n",
+       "      <th>Genres</th>\n",
+       "      <th>Last Updated</th>\n",
+       "      <th>Current Ver</th>\n",
+       "      <th>Android Ver</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>Photo Editor &amp; Candy Camera &amp; Grid &amp; ScrapBook</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.1</td>\n",
+       "      <td>159</td>\n",
+       "      <td>19M</td>\n",
+       "      <td>10,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>January 7, 2018</td>\n",
+       "      <td>1.0.0</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>Coloring book moana</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>3.9</td>\n",
+       "      <td>967</td>\n",
+       "      <td>14M</td>\n",
+       "      <td>500,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design;Pretend Play</td>\n",
+       "      <td>January 15, 2018</td>\n",
+       "      <td>2.0.0</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>U Launcher Lite – FREE Live Cool Themes, Hide ...</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.7</td>\n",
+       "      <td>87510</td>\n",
+       "      <td>8.7M</td>\n",
+       "      <td>5,000,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>August 1, 2018</td>\n",
+       "      <td>1.2.4</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>Sketch - Draw &amp; Paint</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>215644</td>\n",
+       "      <td>25M</td>\n",
+       "      <td>50,000,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Teen</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>June 8, 2018</td>\n",
+       "      <td>Varies with device</td>\n",
+       "      <td>4.2 and up</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>Pixel Draw - Number Art Coloring Book</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.3</td>\n",
+       "      <td>967</td>\n",
+       "      <td>2.8M</td>\n",
+       "      <td>100,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design;Creativity</td>\n",
+       "      <td>June 20, 2018</td>\n",
+       "      <td>1.1</td>\n",
+       "      <td>4.4 and up</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                                                 App        Category  Rating  \\\n",
+       "0     Photo Editor & Candy Camera & Grid & ScrapBook  ART_AND_DESIGN     4.1   \n",
+       "1                                Coloring book moana  ART_AND_DESIGN     3.9   \n",
+       "2  U Launcher Lite – FREE Live Cool Themes, Hide ...  ART_AND_DESIGN     4.7   \n",
+       "3                              Sketch - Draw & Paint  ART_AND_DESIGN     4.5   \n",
+       "4              Pixel Draw - Number Art Coloring Book  ART_AND_DESIGN     4.3   \n",
+       "\n",
+       "  Reviews  Size     Installs  Type Price Content Rating  \\\n",
+       "0     159   19M      10,000+  Free     0       Everyone   \n",
+       "1     967   14M     500,000+  Free     0       Everyone   \n",
+       "2   87510  8.7M   5,000,000+  Free     0       Everyone   \n",
+       "3  215644   25M  50,000,000+  Free     0           Teen   \n",
+       "4     967  2.8M     100,000+  Free     0       Everyone   \n",
+       "\n",
+       "                      Genres      Last Updated         Current Ver  \\\n",
+       "0               Art & Design   January 7, 2018               1.0.0   \n",
+       "1  Art & Design;Pretend Play  January 15, 2018               2.0.0   \n",
+       "2               Art & Design    August 1, 2018               1.2.4   \n",
+       "3               Art & Design      June 8, 2018  Varies with device   \n",
+       "4    Art & Design;Creativity     June 20, 2018                 1.1   \n",
+       "\n",
+       "    Android Ver  \n",
+       "0  4.0.3 and up  \n",
+       "1  4.0.3 and up  \n",
+       "2  4.0.3 and up  \n",
+       "3    4.2 and up  \n",
+       "4    4.4 and up  "
+      ]
+     },
+     "execution_count": 10,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google_play.describe()\n",
+    "google_play.head()"
    ]
   },
   {
@@ -112,11 +453,175 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 11,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>App</th>\n",
+       "      <th>Category</th>\n",
+       "      <th>Rating</th>\n",
+       "      <th>Reviews</th>\n",
+       "      <th>Size</th>\n",
+       "      <th>Installs</th>\n",
+       "      <th>Type</th>\n",
+       "      <th>Price</th>\n",
+       "      <th>Content Rating</th>\n",
+       "      <th>Genres</th>\n",
+       "      <th>Last Updated</th>\n",
+       "      <th>Current Ver</th>\n",
+       "      <th>Android Ver</th>\n",
+       "      <th>Reviews_numeric</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>Photo Editor &amp; Candy Camera &amp; Grid &amp; ScrapBook</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.1</td>\n",
+       "      <td>159</td>\n",
+       "      <td>19M</td>\n",
+       "      <td>10,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>January 7, 2018</td>\n",
+       "      <td>1.0.0</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "      <td>159.0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>Coloring book moana</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>3.9</td>\n",
+       "      <td>967</td>\n",
+       "      <td>14M</td>\n",
+       "      <td>500,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design;Pretend Play</td>\n",
+       "      <td>January 15, 2018</td>\n",
+       "      <td>2.0.0</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "      <td>967.0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>U Launcher Lite – FREE Live Cool Themes, Hide ...</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.7</td>\n",
+       "      <td>87510</td>\n",
+       "      <td>8.7M</td>\n",
+       "      <td>5,000,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>August 1, 2018</td>\n",
+       "      <td>1.2.4</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "      <td>87510.0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>Sketch - Draw &amp; Paint</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>215644</td>\n",
+       "      <td>25M</td>\n",
+       "      <td>50,000,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Teen</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>June 8, 2018</td>\n",
+       "      <td>Varies with device</td>\n",
+       "      <td>4.2 and up</td>\n",
+       "      <td>215644.0</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>Pixel Draw - Number Art Coloring Book</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.3</td>\n",
+       "      <td>967</td>\n",
+       "      <td>2.8M</td>\n",
+       "      <td>100,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design;Creativity</td>\n",
+       "      <td>June 20, 2018</td>\n",
+       "      <td>1.1</td>\n",
+       "      <td>4.4 and up</td>\n",
+       "      <td>967.0</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                                                 App        Category  Rating  \\\n",
+       "0     Photo Editor & Candy Camera & Grid & ScrapBook  ART_AND_DESIGN     4.1   \n",
+       "1                                Coloring book moana  ART_AND_DESIGN     3.9   \n",
+       "2  U Launcher Lite – FREE Live Cool Themes, Hide ...  ART_AND_DESIGN     4.7   \n",
+       "3                              Sketch - Draw & Paint  ART_AND_DESIGN     4.5   \n",
+       "4              Pixel Draw - Number Art Coloring Book  ART_AND_DESIGN     4.3   \n",
+       "\n",
+       "  Reviews  Size     Installs  Type Price Content Rating  \\\n",
+       "0     159   19M      10,000+  Free     0       Everyone   \n",
+       "1     967   14M     500,000+  Free     0       Everyone   \n",
+       "2   87510  8.7M   5,000,000+  Free     0       Everyone   \n",
+       "3  215644   25M  50,000,000+  Free     0           Teen   \n",
+       "4     967  2.8M     100,000+  Free     0       Everyone   \n",
+       "\n",
+       "                      Genres      Last Updated         Current Ver  \\\n",
+       "0               Art & Design   January 7, 2018               1.0.0   \n",
+       "1  Art & Design;Pretend Play  January 15, 2018               2.0.0   \n",
+       "2               Art & Design    August 1, 2018               1.2.4   \n",
+       "3               Art & Design      June 8, 2018  Varies with device   \n",
+       "4    Art & Design;Creativity     June 20, 2018                 1.1   \n",
+       "\n",
+       "    Android Ver  Reviews_numeric  \n",
+       "0  4.0.3 and up            159.0  \n",
+       "1  4.0.3 and up            967.0  \n",
+       "2  4.0.3 and up          87510.0  \n",
+       "3    4.2 and up         215644.0  \n",
+       "4    4.4 and up            967.0  "
+      ]
+     },
+     "execution_count": 11,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google_play[\"Reviews_numeric\"] = google_play[\"Reviews\"].apply(pd.to_numeric, errors='coerce')\n",
+    "google_play.head()"
    ]
   },
   {
@@ -128,11 +633,13 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 14,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "\n",
+    "google_play[\"Reviews_isnull\"] = google_play[\"Reviews_numeric\"].isnull()\n"
    ]
   },
   {
@@ -148,11 +655,89 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 17,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>App</th>\n",
+       "      <th>Category</th>\n",
+       "      <th>Rating</th>\n",
+       "      <th>Reviews</th>\n",
+       "      <th>Size</th>\n",
+       "      <th>Installs</th>\n",
+       "      <th>Type</th>\n",
+       "      <th>Price</th>\n",
+       "      <th>Content Rating</th>\n",
+       "      <th>Genres</th>\n",
+       "      <th>Last Updated</th>\n",
+       "      <th>Current Ver</th>\n",
+       "      <th>Android Ver</th>\n",
+       "      <th>Reviews_numeric</th>\n",
+       "      <th>Reviews_isnull</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>10472</th>\n",
+       "      <td>Life Made WI-Fi Touchscreen Photo Frame</td>\n",
+       "      <td>1.9</td>\n",
+       "      <td>19.0</td>\n",
+       "      <td>3.0M</td>\n",
+       "      <td>1,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>February 11, 2018</td>\n",
+       "      <td>1.0.19</td>\n",
+       "      <td>4.0 and up</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>True</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                                           App Category  Rating Reviews  \\\n",
+       "10472  Life Made WI-Fi Touchscreen Photo Frame      1.9    19.0    3.0M   \n",
+       "\n",
+       "         Size Installs Type     Price Content Rating             Genres  \\\n",
+       "10472  1,000+     Free    0  Everyone            NaN  February 11, 2018   \n",
+       "\n",
+       "      Last Updated Current Ver Android Ver  Reviews_numeric  Reviews_isnull  \n",
+       "10472       1.0.19  4.0 and up         NaN              NaN            True  "
+      ]
+     },
+     "execution_count": 17,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google_play[google_play[\"Reviews_isnull\"]]\n"
    ]
   },
   {
@@ -172,9 +757,20 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 18,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "True"
+      ]
+     },
+     "execution_count": 18,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "# Your code here\n",
     "\n",
@@ -190,7 +786,11 @@
     "    Returns:\n",
     "        The correct numeric value of the Reviews score.\n",
     "    \"\"\"\n",
-    "    return np.NaN\n",
+    "    if 'M' in s:\n",
+    "        return float(s.split('M')[0]) * 1000000\n",
+    "    else:\n",
+    "        return float(s)\n",
+    "\n",
     "\n",
     "test_string = '4.0M'\n",
     "\n",
@@ -206,11 +806,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 19,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_play[\"Reviews\"] = google_play[\"Reviews\"].apply(convert_string_to_numeric)\n"
    ]
   },
   {
@@ -224,11 +825,89 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 21,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>App</th>\n",
+       "      <th>Category</th>\n",
+       "      <th>Rating</th>\n",
+       "      <th>Reviews</th>\n",
+       "      <th>Size</th>\n",
+       "      <th>Installs</th>\n",
+       "      <th>Type</th>\n",
+       "      <th>Price</th>\n",
+       "      <th>Content Rating</th>\n",
+       "      <th>Genres</th>\n",
+       "      <th>Last Updated</th>\n",
+       "      <th>Current Ver</th>\n",
+       "      <th>Android Ver</th>\n",
+       "      <th>Reviews_numeric</th>\n",
+       "      <th>Reviews_isnull</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>10472</th>\n",
+       "      <td>Life Made WI-Fi Touchscreen Photo Frame</td>\n",
+       "      <td>1.9</td>\n",
+       "      <td>19.0</td>\n",
+       "      <td>3000000.0</td>\n",
+       "      <td>1,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>0</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>February 11, 2018</td>\n",
+       "      <td>1.0.19</td>\n",
+       "      <td>4.0 and up</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>True</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                                           App Category  Rating    Reviews  \\\n",
+       "10472  Life Made WI-Fi Touchscreen Photo Frame      1.9    19.0  3000000.0   \n",
+       "\n",
+       "         Size Installs Type     Price Content Rating             Genres  \\\n",
+       "10472  1,000+     Free    0  Everyone            NaN  February 11, 2018   \n",
+       "\n",
+       "      Last Updated Current Ver Android Ver  Reviews_numeric  Reviews_isnull  \n",
+       "10472       1.0.19  4.0 and up         NaN              NaN            True  "
+      ]
+     },
+     "execution_count": 21,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here\n"
+    "# Your code here\n",
+    "google_play[google_play[\"Reviews_isnull\"]]\n"
    ]
   },
   {
@@ -240,11 +919,38 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 22,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "App                 object\n",
+       "Category            object\n",
+       "Rating             float64\n",
+       "Reviews            float64\n",
+       "Size                object\n",
+       "Installs            object\n",
+       "Type                object\n",
+       "Price               object\n",
+       "Content Rating      object\n",
+       "Genres              object\n",
+       "Last Updated        object\n",
+       "Current Ver         object\n",
+       "Android Ver         object\n",
+       "Reviews_numeric    float64\n",
+       "Reviews_isnull        bool\n",
+       "dtype: object"
+      ]
+     },
+     "execution_count": 22,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google_play.dtypes"
    ]
   },
   {
@@ -258,11 +964,79 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 23,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "array(['19M', '14M', '8.7M', '25M', '2.8M', '5.6M', '29M', '33M', '3.1M',\n",
+       "       '28M', '12M', '20M', '21M', '37M', '2.7M', '5.5M', '17M', '39M',\n",
+       "       '31M', '4.2M', '7.0M', '23M', '6.0M', '6.1M', '4.6M', '9.2M',\n",
+       "       '5.2M', '11M', '24M', 'Varies with device', '9.4M', '15M', '10M',\n",
+       "       '1.2M', '26M', '8.0M', '7.9M', '56M', '57M', '35M', '54M', '201k',\n",
+       "       '3.6M', '5.7M', '8.6M', '2.4M', '27M', '2.5M', '16M', '3.4M',\n",
+       "       '8.9M', '3.9M', '2.9M', '38M', '32M', '5.4M', '18M', '1.1M',\n",
+       "       '2.2M', '4.5M', '9.8M', '52M', '9.0M', '6.7M', '30M', '2.6M',\n",
+       "       '7.1M', '3.7M', '22M', '7.4M', '6.4M', '3.2M', '8.2M', '9.9M',\n",
+       "       '4.9M', '9.5M', '5.0M', '5.9M', '13M', '73M', '6.8M', '3.5M',\n",
+       "       '4.0M', '2.3M', '7.2M', '2.1M', '42M', '7.3M', '9.1M', '55M',\n",
+       "       '23k', '6.5M', '1.5M', '7.5M', '51M', '41M', '48M', '8.5M', '46M',\n",
+       "       '8.3M', '4.3M', '4.7M', '3.3M', '40M', '7.8M', '8.8M', '6.6M',\n",
+       "       '5.1M', '61M', '66M', '79k', '8.4M', '118k', '44M', '695k', '1.6M',\n",
+       "       '6.2M', '18k', '53M', '1.4M', '3.0M', '5.8M', '3.8M', '9.6M',\n",
+       "       '45M', '63M', '49M', '77M', '4.4M', '4.8M', '70M', '6.9M', '9.3M',\n",
+       "       '10.0M', '8.1M', '36M', '84M', '97M', '2.0M', '1.9M', '1.8M',\n",
+       "       '5.3M', '47M', '556k', '526k', '76M', '7.6M', '59M', '9.7M', '78M',\n",
+       "       '72M', '43M', '7.7M', '6.3M', '334k', '34M', '93M', '65M', '79M',\n",
+       "       '100M', '58M', '50M', '68M', '64M', '67M', '60M', '94M', '232k',\n",
+       "       '99M', '624k', '95M', '8.5k', '41k', '292k', '11k', '80M', '1.7M',\n",
+       "       '74M', '62M', '69M', '75M', '98M', '85M', '82M', '96M', '87M',\n",
+       "       '71M', '86M', '91M', '81M', '92M', '83M', '88M', '704k', '862k',\n",
+       "       '899k', '378k', '266k', '375k', '1.3M', '975k', '980k', '4.1M',\n",
+       "       '89M', '696k', '544k', '525k', '920k', '779k', '853k', '720k',\n",
+       "       '713k', '772k', '318k', '58k', '241k', '196k', '857k', '51k',\n",
+       "       '953k', '865k', '251k', '930k', '540k', '313k', '746k', '203k',\n",
+       "       '26k', '314k', '239k', '371k', '220k', '730k', '756k', '91k',\n",
+       "       '293k', '17k', '74k', '14k', '317k', '78k', '924k', '902k', '818k',\n",
+       "       '81k', '939k', '169k', '45k', '475k', '965k', '90M', '545k', '61k',\n",
+       "       '283k', '655k', '714k', '93k', '872k', '121k', '322k', '1.0M',\n",
+       "       '976k', '172k', '238k', '549k', '206k', '954k', '444k', '717k',\n",
+       "       '210k', '609k', '308k', '705k', '306k', '904k', '473k', '175k',\n",
+       "       '350k', '383k', '454k', '421k', '70k', '812k', '442k', '842k',\n",
+       "       '417k', '412k', '459k', '478k', '335k', '782k', '721k', '430k',\n",
+       "       '429k', '192k', '200k', '460k', '728k', '496k', '816k', '414k',\n",
+       "       '506k', '887k', '613k', '243k', '569k', '778k', '683k', '592k',\n",
+       "       '319k', '186k', '840k', '647k', '191k', '373k', '437k', '598k',\n",
+       "       '716k', '585k', '982k', '222k', '219k', '55k', '948k', '323k',\n",
+       "       '691k', '511k', '951k', '963k', '25k', '554k', '351k', '27k',\n",
+       "       '82k', '208k', '913k', '514k', '551k', '29k', '103k', '898k',\n",
+       "       '743k', '116k', '153k', '209k', '353k', '499k', '173k', '597k',\n",
+       "       '809k', '122k', '411k', '400k', '801k', '787k', '237k', '50k',\n",
+       "       '643k', '986k', '97k', '516k', '837k', '780k', '961k', '269k',\n",
+       "       '20k', '498k', '600k', '749k', '642k', '881k', '72k', '656k',\n",
+       "       '601k', '221k', '228k', '108k', '940k', '176k', '33k', '663k',\n",
+       "       '34k', '942k', '259k', '164k', '458k', '245k', '629k', '28k',\n",
+       "       '288k', '775k', '785k', '636k', '916k', '994k', '309k', '485k',\n",
+       "       '914k', '903k', '608k', '500k', '54k', '562k', '847k', '957k',\n",
+       "       '688k', '811k', '270k', '48k', '329k', '523k', '921k', '874k',\n",
+       "       '981k', '784k', '280k', '24k', '518k', '754k', '892k', '154k',\n",
+       "       '860k', '364k', '387k', '626k', '161k', '879k', '39k', '970k',\n",
+       "       '170k', '141k', '160k', '144k', '143k', '190k', '376k', '193k',\n",
+       "       '246k', '73k', '658k', '992k', '253k', '420k', '404k', '1,000+',\n",
+       "       '470k', '226k', '240k', '89k', '234k', '257k', '861k', '467k',\n",
+       "       '157k', '44k', '676k', '67k', '552k', '885k', '1020k', '582k',\n",
+       "       '619k'], dtype=object)"
+      ]
+     },
+     "execution_count": 23,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google_play[\"Size\"].unique()"
    ]
   },
   {
@@ -278,11 +1052,43 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 24,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "0.15635089013928605"
+      ]
+     },
+     "execution_count": 24,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google_play[\"Size\"][google_play[\"Size\"] == \"Varies with device\"].count()/len(google_play)\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 37,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "0.15635089013928605"
+      ]
+     },
+     "execution_count": 37,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:\n"
+    "sum(google_play[\"Size\"] == \"Varies with device\")/len(google_play)"
    ]
   },
   {
@@ -298,11 +1104,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 38,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_play.drop('Size', axis=1, inplace=True)\n"
    ]
   },
   {
@@ -318,11 +1125,37 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 39,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "App                   0\n",
+       "Category              0\n",
+       "Rating             1474\n",
+       "Reviews               0\n",
+       "Installs              0\n",
+       "Type                  1\n",
+       "Price                 0\n",
+       "Content Rating        1\n",
+       "Genres                0\n",
+       "Last Updated          0\n",
+       "Current Ver           8\n",
+       "Android Ver           3\n",
+       "Reviews_numeric       1\n",
+       "Reviews_isnull        0\n",
+       "dtype: int64"
+      ]
+     },
+     "execution_count": 39,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google_play.isna().sum()\n"
    ]
   },
   {
@@ -338,11 +1171,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 40,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "0.13596531685268887"
+      ]
+     },
+     "execution_count": 40,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_play['Rating'].isna().sum()/len(google_play)\n"
    ]
   },
   {
@@ -364,11 +1209,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 41,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_missing_removed = google_play.dropna()\n"
    ]
   },
   {
@@ -384,11 +1230,25 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 42,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "C:\\Users\\sfsou\\AppData\\Local\\Temp\\ipykernel_8528\\555828734.py:2: SettingWithCopyWarning: \n",
+      "A value is trying to be set on a copy of a slice from a DataFrame.\n",
+      "Try using .loc[row_indexer,col_indexer] = value instead\n",
+      "\n",
+      "See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy\n",
+      "  google_missing_removed['Last Updated'] = pd.to_datetime(google_missing_removed['Last Updated'])\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_missing_removed['Last Updated'] = pd.to_datetime(google_missing_removed['Last Updated'])\n"
    ]
   },
   {
@@ -402,11 +1262,33 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 43,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "array(['0', '$4.99', '$3.99', '$6.99', '$7.99', '$5.99', '$2.99', '$3.49',\n",
+       "       '$1.99', '$9.99', '$7.49', '$0.99', '$9.00', '$5.49', '$10.00',\n",
+       "       '$24.99', '$11.99', '$79.99', '$16.99', '$14.99', '$29.99',\n",
+       "       '$12.99', '$2.49', '$10.99', '$1.50', '$19.99', '$15.99', '$33.99',\n",
+       "       '$39.99', '$3.95', '$4.49', '$1.70', '$8.99', '$1.49', '$3.88',\n",
+       "       '$399.99', '$17.99', '$400.00', '$3.02', '$1.76', '$4.84', '$4.77',\n",
+       "       '$1.61', '$2.50', '$1.59', '$6.49', '$1.29', '$299.99', '$379.99',\n",
+       "       '$37.99', '$18.99', '$389.99', '$8.49', '$1.75', '$14.00', '$2.00',\n",
+       "       '$3.08', '$2.59', '$19.40', '$3.90', '$4.59', '$15.46', '$3.04',\n",
+       "       '$13.99', '$4.29', '$3.28', '$4.60', '$1.00', '$2.95', '$2.90',\n",
+       "       '$1.97', '$2.56', '$1.20'], dtype=object)"
+      ]
+     },
+     "execution_count": 43,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google_missing_removed['Price'].unique()\n"
    ]
   },
   {
@@ -422,11 +1304,25 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 44,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "C:\\Users\\sfsou\\AppData\\Local\\Temp\\ipykernel_8528\\1040229063.py:2: SettingWithCopyWarning: \n",
+      "A value is trying to be set on a copy of a slice from a DataFrame.\n",
+      "Try using .loc[row_indexer,col_indexer] = value instead\n",
+      "\n",
+      "See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy\n",
+      "  google_missing_removed['Price Numerical'] = google_missing_removed['Price'].apply(lambda x: x.replace('$', ''))\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_missing_removed['Price Numerical'] = google_missing_removed['Price'].apply(lambda x: x.replace('$', ''))\n"
    ]
   },
   {
@@ -438,11 +1334,25 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 45,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "C:\\Users\\sfsou\\AppData\\Local\\Temp\\ipykernel_8528\\1355375399.py:2: SettingWithCopyWarning: \n",
+      "A value is trying to be set on a copy of a slice from a DataFrame.\n",
+      "Try using .loc[row_indexer,col_indexer] = value instead\n",
+      "\n",
+      "See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy\n",
+      "  google_missing_removed['Price Numerical'] = pd.to_numeric(google_missing_removed['Price Numerical'], errors='coerce')\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_missing_removed['Price Numerical'] = pd.to_numeric(google_missing_removed['Price Numerical'], errors='coerce')\n"
    ]
   },
   {
@@ -454,11 +1364,24 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 46,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "C:\\Users\\sfsou\\AppData\\Local\\Temp\\ipykernel_8528\\3823663350.py:2: SettingWithCopyWarning: \n",
+      "A value is trying to be set on a copy of a slice from a DataFrame\n",
+      "\n",
+      "See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy\n",
+      "  google_missing_removed.drop('Price', axis=1, inplace=True)\n"
+     ]
+    }
+   ],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_missing_removed.drop('Price', axis=1, inplace=True)\n"
    ]
   },
   {
@@ -474,11 +1397,37 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 47,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "App                        object\n",
+       "Category                   object\n",
+       "Rating                    float64\n",
+       "Reviews                   float64\n",
+       "Installs                   object\n",
+       "Type                       object\n",
+       "Content Rating             object\n",
+       "Genres                     object\n",
+       "Last Updated       datetime64[ns]\n",
+       "Current Ver                object\n",
+       "Android Ver                object\n",
+       "Reviews_numeric           float64\n",
+       "Reviews_isnull               bool\n",
+       "Price Numerical           float64\n",
+       "dtype: object"
+      ]
+     },
+     "execution_count": 47,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here"
+    "# Your code here\n",
+    "google_missing_removed.dtypes\n"
    ]
   },
   {
@@ -497,11 +1446,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 49,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_reviews = google_play = pd.read_csv('data/googleplaystore_user_reviews.csv')\n"
    ]
   },
   {
@@ -515,11 +1465,106 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 50,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>App</th>\n",
+       "      <th>Translated_Review</th>\n",
+       "      <th>Sentiment</th>\n",
+       "      <th>Sentiment_Polarity</th>\n",
+       "      <th>Sentiment_Subjectivity</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>10 Best Foods for You</td>\n",
+       "      <td>I like eat delicious food. That's I'm cooking ...</td>\n",
+       "      <td>Positive</td>\n",
+       "      <td>1.00</td>\n",
+       "      <td>0.533333</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>10 Best Foods for You</td>\n",
+       "      <td>This help eating healthy exercise regular basis</td>\n",
+       "      <td>Positive</td>\n",
+       "      <td>0.25</td>\n",
+       "      <td>0.288462</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>10 Best Foods for You</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>10 Best Foods for You</td>\n",
+       "      <td>Works great especially going grocery store</td>\n",
+       "      <td>Positive</td>\n",
+       "      <td>0.40</td>\n",
+       "      <td>0.875000</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>10 Best Foods for You</td>\n",
+       "      <td>Best idea us</td>\n",
+       "      <td>Positive</td>\n",
+       "      <td>1.00</td>\n",
+       "      <td>0.300000</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                     App                                  Translated_Review  \\\n",
+       "0  10 Best Foods for You  I like eat delicious food. That's I'm cooking ...   \n",
+       "1  10 Best Foods for You    This help eating healthy exercise regular basis   \n",
+       "2  10 Best Foods for You                                                NaN   \n",
+       "3  10 Best Foods for You         Works great especially going grocery store   \n",
+       "4  10 Best Foods for You                                       Best idea us   \n",
+       "\n",
+       "  Sentiment  Sentiment_Polarity  Sentiment_Subjectivity  \n",
+       "0  Positive                1.00                0.533333  \n",
+       "1  Positive                0.25                0.288462  \n",
+       "2       NaN                 NaN                     NaN  \n",
+       "3  Positive                0.40                0.875000  \n",
+       "4  Positive                1.00                0.300000  "
+      ]
+     },
+     "execution_count": 50,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here\n"
+    "# Your code here\n",
+    "google_reviews.head()"
    ]
   },
   {
@@ -546,11 +1591,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 51,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "review_missing_removed = google_reviews.dropna()\n"
    ]
   },
   {
@@ -562,11 +1608,35 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 52,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "App\n",
+       "Bowmasters                        312\n",
+       "Helix Jump                        273\n",
+       "Angry Birds Classic               273\n",
+       "Calorie Counter - MyFitnessPal    254\n",
+       "Duolingo: Learn Languages Free    240\n",
+       "                                 ... \n",
+       "Draw a Stickman: EPIC 2             1\n",
+       "HD Camera                           1\n",
+       "Draw In                             1\n",
+       "Draw A Stickman                     1\n",
+       "Best Fiends - Free Puzzle Game      1\n",
+       "Name: count, Length: 865, dtype: int64"
+      ]
+     },
+     "execution_count": 52,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "review_missing_removed['App'].value_counts()\n"
    ]
   },
   {
@@ -595,7 +1665,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 54,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -611,7 +1681,7 @@
     "    Returns:\n",
     "        The number of occurrences of `Positive` in the column data.\n",
     "    \"\"\"\n",
-    "    return 0"
+    "    return len(np.where(x == 'Positive')[0])"
    ]
   },
   {
@@ -635,11 +1705,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 55,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_agg = review_missing_removed.groupby(['App']).agg({'Sentiment': positive_function, 'Sentiment_Polarity':'count'}).reset_index().rename(columns={'Sentiment':'Positive', 'Sentiment_Polarity':'Total'})\n"
    ]
   },
   {
@@ -651,11 +1722,87 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 56,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>App</th>\n",
+       "      <th>Positive</th>\n",
+       "      <th>Total</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>10 Best Foods for You</td>\n",
+       "      <td>162</td>\n",
+       "      <td>194</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>104 找工作 - 找工作 找打工 找兼職 履歷健檢 履歷診療室</td>\n",
+       "      <td>31</td>\n",
+       "      <td>40</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>11st</td>\n",
+       "      <td>23</td>\n",
+       "      <td>39</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>1800 Contacts - Lens Store</td>\n",
+       "      <td>64</td>\n",
+       "      <td>80</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>1LINE – One Line with One Touch</td>\n",
+       "      <td>27</td>\n",
+       "      <td>38</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                                App  Positive  Total\n",
+       "0             10 Best Foods for You       162    194\n",
+       "1  104 找工作 - 找工作 找打工 找兼職 履歷健檢 履歷診療室        31     40\n",
+       "2                              11st        23     39\n",
+       "3        1800 Contacts - Lens Store        64     80\n",
+       "4   1LINE – One Line with One Touch        27     38"
+      ]
+     },
+     "execution_count": 56,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
-    "# Your code here\n"
+    "# Your code here\n",
+    "google_agg.head()"
    ]
   },
   {
@@ -669,11 +1816,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 57,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_agg['Positive Ratio'] = np.where(google_agg['Total']>0, google_agg['Positive']/google_agg['Total'], np.nan)\n"
    ]
   },
   {
@@ -685,11 +1833,12 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 58,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google_agg.drop(['Total', 'Positive'], axis=1, inplace=True)\n"
    ]
   },
   {
@@ -703,11 +1852,81 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 59,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>App</th>\n",
+       "      <th>Positive Ratio</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>10 Best Foods for You</td>\n",
+       "      <td>0.835052</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>104 找工作 - 找工作 找打工 找兼職 履歷健檢 履歷診療室</td>\n",
+       "      <td>0.775000</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>11st</td>\n",
+       "      <td>0.589744</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>1800 Contacts - Lens Store</td>\n",
+       "      <td>0.800000</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>1LINE – One Line with One Touch</td>\n",
+       "      <td>0.710526</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                                App  Positive Ratio\n",
+       "0             10 Best Foods for You        0.835052\n",
+       "1  104 找工作 - 找工作 找打工 找兼職 履歷健檢 履歷診療室        0.775000\n",
+       "2                              11st        0.589744\n",
+       "3        1800 Contacts - Lens Store        0.800000\n",
+       "4   1LINE – One Line with One Touch        0.710526"
+      ]
+     },
+     "execution_count": 59,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google_agg.head()\n"
    ]
   },
   {
@@ -723,11 +1942,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 60,
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Your code here:\n"
+    "# Your code here:\n",
+    "google = pd.merge(left=google_missing_removed.drop(['Reviews_numeric', 'Reviews_isnull'], axis=1),\n",
+    "        right=google_agg,\n",
+    "        left_on='App',\n",
+    "        right_on='App',\n",
+    "        how='outer')"
    ]
   },
   {
@@ -741,11 +1965,168 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# Your code here:\n"
+   "execution_count": 61,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>App</th>\n",
+       "      <th>Category</th>\n",
+       "      <th>Rating</th>\n",
+       "      <th>Reviews</th>\n",
+       "      <th>Installs</th>\n",
+       "      <th>Type</th>\n",
+       "      <th>Content Rating</th>\n",
+       "      <th>Genres</th>\n",
+       "      <th>Last Updated</th>\n",
+       "      <th>Current Ver</th>\n",
+       "      <th>Android Ver</th>\n",
+       "      <th>Price Numerical</th>\n",
+       "      <th>Positive Ratio</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>Photo Editor &amp; Candy Camera &amp; Grid &amp; ScrapBook</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.1</td>\n",
+       "      <td>159.0</td>\n",
+       "      <td>10,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>2018-01-07</td>\n",
+       "      <td>1.0.0</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "      <td>0.0</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>Coloring book moana</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>3.9</td>\n",
+       "      <td>967.0</td>\n",
+       "      <td>500,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design;Pretend Play</td>\n",
+       "      <td>2018-01-15</td>\n",
+       "      <td>2.0.0</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "      <td>0.0</td>\n",
+       "      <td>0.590909</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>Coloring book moana</td>\n",
+       "      <td>FAMILY</td>\n",
+       "      <td>3.9</td>\n",
+       "      <td>974.0</td>\n",
+       "      <td>500,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design;Pretend Play</td>\n",
+       "      <td>2018-01-15</td>\n",
+       "      <td>2.0.0</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "      <td>0.0</td>\n",
+       "      <td>0.590909</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>U Launcher Lite – FREE Live Cool Themes, Hide ...</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.7</td>\n",
+       "      <td>87510.0</td>\n",
+       "      <td>5,000,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>Everyone</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>2018-08-01</td>\n",
+       "      <td>1.2.4</td>\n",
+       "      <td>4.0.3 and up</td>\n",
+       "      <td>0.0</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>Sketch - Draw &amp; Paint</td>\n",
+       "      <td>ART_AND_DESIGN</td>\n",
+       "      <td>4.5</td>\n",
+       "      <td>215644.0</td>\n",
+       "      <td>50,000,000+</td>\n",
+       "      <td>Free</td>\n",
+       "      <td>Teen</td>\n",
+       "      <td>Art &amp; Design</td>\n",
+       "      <td>2018-06-08</td>\n",
+       "      <td>Varies with device</td>\n",
+       "      <td>4.2 and up</td>\n",
+       "      <td>0.0</td>\n",
+       "      <td>NaN</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "                                                 App        Category  Rating  \\\n",
+       "0     Photo Editor & Candy Camera & Grid & ScrapBook  ART_AND_DESIGN     4.1   \n",
+       "1                                Coloring book moana  ART_AND_DESIGN     3.9   \n",
+       "2                                Coloring book moana          FAMILY     3.9   \n",
+       "3  U Launcher Lite – FREE Live Cool Themes, Hide ...  ART_AND_DESIGN     4.7   \n",
+       "4                              Sketch - Draw & Paint  ART_AND_DESIGN     4.5   \n",
+       "\n",
+       "    Reviews     Installs  Type Content Rating                     Genres  \\\n",
+       "0     159.0      10,000+  Free       Everyone               Art & Design   \n",
+       "1     967.0     500,000+  Free       Everyone  Art & Design;Pretend Play   \n",
+       "2     974.0     500,000+  Free       Everyone  Art & Design;Pretend Play   \n",
+       "3   87510.0   5,000,000+  Free       Everyone               Art & Design   \n",
+       "4  215644.0  50,000,000+  Free           Teen               Art & Design   \n",
+       "\n",
+       "  Last Updated         Current Ver   Android Ver  Price Numerical  \\\n",
+       "0   2018-01-07               1.0.0  4.0.3 and up              0.0   \n",
+       "1   2018-01-15               2.0.0  4.0.3 and up              0.0   \n",
+       "2   2018-01-15               2.0.0  4.0.3 and up              0.0   \n",
+       "3   2018-08-01               1.2.4  4.0.3 and up              0.0   \n",
+       "4   2018-06-08  Varies with device    4.2 and up              0.0   \n",
+       "\n",
+       "   Positive Ratio  \n",
+       "0             NaN  \n",
+       "1        0.590909  \n",
+       "2        0.590909  \n",
+       "3             NaN  \n",
+       "4             NaN  "
+      ]
+     },
+     "execution_count": 61,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Your code here:\n",
+    "google.head()\n"
    ]
   }
  ],
@@ -765,7 +2146,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.2"
+   "version": "3.10.9"
   }
  },
  "nbformat": 4,