diff --git a/main.ipynb b/main.ipynb
index b05630a..962783f 100644
--- a/main.ipynb
+++ b/main.ipynb
@@ -20,7 +20,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 3,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -37,33 +37,42 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [],
    "source": [
     "def greater(a,b):\n",
-    "#your code here"
+    "#your code here\n",
+    "    if a > b:\n",
+    "        return a\n",
+    "    elif b > a:\n",
+    "        return b\n",
+    "    \n",
+    "      \n"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "....................................................................................................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 100 tests in 0.097s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_greater(greater)"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "#your code here"
-   ]
-  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -73,18 +82,36 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 30,
    "metadata": {},
    "outputs": [],
    "source": [
-    "#your code here"
+    "#your code here\n",
+    "def greatest(list):\n",
+    "    largest = lst[0]  \n",
+    "    for num in lst:\n",
+    "        if num > largest:\n",
+    "            largest = num\n",
+    "    return largest"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 13,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "....................................................................................................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 100 tests in 0.124s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_greatest(greatest)"
@@ -99,21 +126,37 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 35,
    "metadata": {},
    "outputs": [],
    "source": [
     "def sum_all(lst):\n",
-    "#your code here"
+    "#your code here\n",
+    "    total = 0\n",
+    "    for item in lst:\n",
+    "       total = total + item\n",
+    "    return total"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 36,
    "metadata": {
     "scrolled": true
    },
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "....................................................................................................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 100 tests in 0.165s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_sum(sum_all)"
@@ -128,21 +171,45 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 38,
    "metadata": {},
    "outputs": [],
    "source": [
     "def mult_all(lst):\n",
-    "#your code here"
+    "#your code here\n",
+    "    result = 1\n",
+    "    for i in lst:\n",
+    "        result *= i\n",
+    "\n",
+    "    return result"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 22,
    "metadata": {
     "scrolled": true
    },
-   "outputs": [],
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      ".................."
+     ]
+    },
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "..................................................................................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 100 tests in 0.195s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_mult(mult_all)"
@@ -157,19 +224,41 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 39,
    "metadata": {},
    "outputs": [],
    "source": [
     "def oper_all(arr, oper = \"*\"):\n",
-    "#your code here"
+    "#your code here\n",
+    "    if oper == \"+\":\n",
+    "        return sum(arr)\n",
+    "    \n",
+    "    if oper == \"*\":\n",
+    "        result = 1\n",
+    "        for i in arr:\n",
+    "            result *= i\n",
+    "        return result\n",
+    "\n",
+    "\n"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 28,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "....................................................................................................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 100 tests in 0.133s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_operations(oper_all)"
@@ -184,12 +273,18 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 44,
    "metadata": {},
    "outputs": [],
    "source": [
     "def factorial(n):\n",
-    "#your code here"
+    "#your code here\n",
+    "\n",
+    "    if n <= 0:\n",
+    "        return 1\n",
+    "    else:\n",
+    "        local_factorial = n * factorial(n - 1)\n",
+    "        return local_factorial"
    ]
   },
   {
@@ -213,9 +308,21 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 45,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "....................................................................................................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 100 tests in 0.144s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_factorial(factorial)"
@@ -232,19 +339,38 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 46,
    "metadata": {},
    "outputs": [],
    "source": [
     "def unique(lst_un):\n",
-    "#your code here"
+    "#your code here\n",
+    "    unique_list = []\n",
+    "    \n",
+    "    for i in lst_un:\n",
+    "        if i not in unique_list:\n",
+    "            unique_list.append(i)\n",
+    "\n",
+    "    return unique_list\n"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 47,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "....................................................................................................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 100 tests in 0.560s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_unique(unique)"
@@ -260,19 +386,47 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 48,
    "metadata": {},
    "outputs": [],
    "source": [
     "def mode_counter(arr):\n",
-    "#your code here"
+    "#your code here\n",
+    "    mode = None\n",
+    "    mode_count = 0\n",
+    "\n",
+    "    for item in arr:\n",
+    "        \n",
+    "        count = 0\n",
+    "        for other in arr:\n",
+    "            if other == item:\n",
+    "                count += 1\n",
+    "\n",
+    "       \n",
+    "        if count > mode_count:\n",
+    "            mode_count = count\n",
+    "            mode = item\n",
+    "\n",
+    "    return mode\n"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 49,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "....................................................................................................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 100 tests in 0.606s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_mode(mode_counter)"
@@ -288,19 +442,52 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 55,
    "metadata": {},
    "outputs": [],
    "source": [
     "def st_dev(list_sd):\n",
-    "#your code here"
+    "#your code here\n",
+    "    # mean\n",
+    "    total = 0\n",
+    "    count = 0\n",
+    "    for x in list_sd:\n",
+    "        total += x\n",
+    "        count += 1\n",
+    "    if count == 0:\n",
+    "        return 0.0  \n",
+    "    mean = total / count\n",
+    "\n",
+    "    # sum of squared deviations\n",
+    "    ss = 0\n",
+    "    for x in list_sd:\n",
+    "        d = x - mean\n",
+    "        ss += d * d\n",
+    "\n",
+    "    # sample variance and stdev\n",
+    "    if count == 1:\n",
+    "        return 0.0\n",
+    "    variance = ss / (count - 1)\n",
+    "    return variance ** 0.5\n"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 56,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "....................................................................................................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 100 tests in 0.208s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_stdev(st_dev)"
@@ -315,19 +502,55 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 65,
    "metadata": {},
    "outputs": [],
    "source": [
     "def pangram(string):\n",
-    "#your code here"
+    "#your code here\n",
+    "    alphabet = \"abcdefghijklmnopqrstuvwxyz\"\n",
+    "    letters_found = []\n",
+    "\n",
+    "    # converting to lowercase for comparison\n",
+    "    for char in string:\n",
+    "        if \"a\" <= char.lower() <= \"z\":\n",
+    "            # checking if char already added\n",
+    "            found = False\n",
+    "            for l in letters_found:\n",
+    "                if l == char.lower():\n",
+    "                    found = True\n",
+    "                    break\n",
+    "            if not found:\n",
+    "                letters_found.append(char.lower())\n",
+    "\n",
+    "    # checking for the 26 letters\n",
+    "    count = 0\n",
+    "    for _ in letters_found:\n",
+    "        count += 1\n",
+    "\n",
+    "    if count == 26:\n",
+    "        return True\n",
+    "    else:\n",
+    "        return False\n"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 66,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "..............................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 30 tests in 0.046s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_pangram(pangram)"
@@ -344,19 +567,65 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 67,
    "metadata": {},
    "outputs": [],
    "source": [
     "def sort_alpha(string):\n",
-    "#your code here"
+    "#your code here\n",
+    "\n",
+    "    # splitting the string by commas into a list\n",
+    "    words = []\n",
+    "    word = \"\"\n",
+    "    for ch in string:\n",
+    "        if ch != \",\":\n",
+    "            word += ch\n",
+    "        else:\n",
+    "            words.append(word)\n",
+    "            word = \"\"\n",
+    "    words.append(word)  # add the last word\n",
+    "\n",
+    "    # sort\n",
+    "    n = 0\n",
+    "    for _ in words:\n",
+    "        n += 1\n",
+    "\n",
+    "    for i in range(n):\n",
+    "        for j in range(0, n - i - 1):\n",
+    "            if words[j] > words[j + 1]:\n",
+    "                temp = words[j]\n",
+    "                words[j] = words[j + 1]\n",
+    "                words[j + 1] = temp\n",
+    "\n",
+    "    # joinning back into a comma-separated string\n",
+    "    result = \"\"\n",
+    "    first = True\n",
+    "    for w in words:\n",
+    "        if not first:\n",
+    "            result += \",\"\n",
+    "        result += w\n",
+    "        first = False\n",
+    "\n",
+    "    return result\n"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 68,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "....................................................................................................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 100 tests in 0.142s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_alpha(sort_alpha)"
@@ -371,19 +640,61 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 69,
    "metadata": {},
    "outputs": [],
    "source": [
     "def check_pass(password):\n",
-    "#your code here"
+    "#your code here\n",
+    "\n",
+    "    # Checking the length\n",
+    "    length_ok = False\n",
+    "    count = 0\n",
+    "    for _ in password:\n",
+    "        count += 1\n",
+    "    if count >= 8:\n",
+    "        length_ok = True\n",
+    "\n",
+    "    # Checking for character types\n",
+    "    has_lower = False\n",
+    "    has_upper = False\n",
+    "    has_digit = False\n",
+    "    has_special = False\n",
+    "\n",
+    "    for ch in password:\n",
+    "        if 'a' <= ch <= 'z':\n",
+    "            has_lower = True\n",
+    "        elif 'A' <= ch <= 'Z':\n",
+    "            has_upper = True\n",
+    "        elif '0' <= ch <= '9':\n",
+    "            has_digit = True\n",
+    "        else:\n",
+    "            has_special = True\n",
+    "\n",
+    "    # Stong Password only if all are True\n",
+    "    if length_ok and has_lower and has_upper and has_digit and has_special:\n",
+    "        return True\n",
+    "    else:\n",
+    "        return False\n"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 70,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "....................................................................................................\n",
+      "----------------------------------------------------------------------\n",
+      "Ran 100 tests in 0.120s\n",
+      "\n",
+      "OK\n"
+     ]
+    }
+   ],
    "source": [
     "# This will test your function \n",
     "test_pass(check_pass)"
@@ -392,7 +703,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "base",
    "language": "python",
    "name": "python3"
   },
@@ -406,12 +717,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.13"
-  },
-  "vscode": {
-   "interpreter": {
-    "hash": "aee8b7b246df8f9039afb4144a1f6fd8d2ca17a180786b69acc140d282b71a49"
-   }
+   "version": "3.12.7"
   }
  },
  "nbformat": 4,
diff --git a/mod/__pycache__/testing.cpython-312.pyc b/mod/__pycache__/testing.cpython-312.pyc
new file mode 100644
index 0000000..23dc913
Binary files /dev/null and b/mod/__pycache__/testing.cpython-312.pyc differ