Added utils module

app/utils.py

+from itertools import zip_longest
+
+
+def map_values_to_int(values: dict):
+    values = [map(int, i) for i in list(values.values())]
+    return zip_longest(*values, fillvalue=None)
+
+
+def calculate_mean(values: list) -> float:
+    n_answers = sum(x is not None for x in values)
+    sum_of_answers = float(sum(filter(None, values)))
+    mean = sum_of_answers / n_answers
+    return round(mean, 2)
+
+
+def get_mean_from_slider_answers(answers):
+    return [calculate_mean(values) for values in map_values_to_int(answers)]