diff --git a/build.py b/build.py
index 35cdd2a..85f715e 100644
--- a/build.py
+++ b/build.py
@@ -1,26 +1,52 @@
-def get_categorical_variables(df):
-    return []
+import numpy as np
+import pandas as pd
+from pandas import Series, DataFrame
+import operator
+import matplotlib.pyplot as plt
 
+df = pd.read_csv('data/conversion_data.csv')
 
-def get_numerical_variables(df):
-    return []
+def get_categorical_variables(df):
+    return df[['country','source','new_user','converted']]
 
+def get_numerical_variables(df):
+    return df._get_numeric_data()
 
 def get_numerical_variables_percentile(df):
-    pass
-
+    df_temp = get_numerical_variables(df)
+    return df_temp.describe().T
 
 def get_categorical_variables_modes(df):
-    pass
-
+    dic = {'converted':0, 'country':'', 'new_user':0, 'source':''}
+    for col in df.mode().columns:
+        dic[col] = df.mode()[col][0]
+    return pd.DataFrame(dic.items(), columns=['var_name', 'mode'])
 
 def get_missing_values_count(df):
-    pass
-
+    my_ans = pd.DataFrame(df.isnull().sum(), columns=['missing_value_count'])
+    my_ans.index.name = 'var_name'
+    return my_ans
 
 def plot_histogram_with_numerical_values(df):
+    fig, axes = plt.subplots(2, 2)
+    df1 = get_numerical_variables(df)
+    list_of_cols = df1.columns
+    axes[0,0].hist(df[list_of_cols[0]])
+    axes[0,0].set_title(list_of_cols[0])
+    axes[0,1].hist(df[list_of_cols[1]])
+    axes[0,1].set_title(list_of_cols[1])
+    axes[1,0].hist(df[list_of_cols[2]])
+    axes[1,0].set_title(list_of_cols[2])
+    axes[1,1].hist(df[list_of_cols[3]])
+    axes[1,1].set_title(list_of_cols[3])
+    plt.tight_layout()
+    plt.show()
     pass
 
-
 def plot_facet_box(df):
+    list_of_cols = df.columns
+    for col in list_of_cols:
+        plt.boxplot(df[col], 1)
+        plt.title(col)
+        plt.show()
     pass
diff --git a/build.pyc b/build.pyc
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diff --git a/tests/__init__.pyc b/tests/__init__.pyc
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index 0000000..8f64e31
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diff --git a/tests/test_get_categorical_variables.pyc b/tests/test_get_categorical_variables.pyc
new file mode 100644
index 0000000..9bd5ea4
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