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: [192.335, 189.22, 235.216, 130.727, 222.285]

SOLUTION: 193.957

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

SOLUTION: 60.22

PROBLEM: [64.738, 65.665, 96.525, -45.422, -87.911]

SOLUTION:
18.719