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: [129.453, 232.284, -34.595]

SOLUTION: 109.047

PROBLEM: [-31.241, 73.981, 127.71, 166.275, 35.028, -10.432]

SOLUTION: 60.22

PROBLEM: [196.174, -20.323, 230.679, 179.193]

SOLUTION:
146.431