TASK DEFINITION: In this task you will be given a list of numbers and you need to find the mean (average) of that list. The mean of a list can be found by summing every number in the list then dividing the result by the size of that list. The output should be rounded to 3 decimal places.
PROBLEM: [212.456, 6.972, -59.399, -83.342, 215.038, -97.851]

SOLUTION: 32.312

PROBLEM: [22.971, 146.947, 84.327, 123.65, -30.682, -43.973, 211.836, 146.398, -65.992]

SOLUTION: 66.165

PROBLEM: [79.015, 115.12, 28.584, 216.542, 5.913, -35.628, 57.618, 199.027, 23.986]

SOLUTION:
76.686