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: [199.874, -45.634, -39.343, 75.985, 143.35, 87.15, 120.645, -34.636, 159.567]

SOLUTION: 74.106

PROBLEM: [-59.526, 55.871, 118.248, 197.073]

SOLUTION: 77.916

PROBLEM: [191.229, -4.985, -59.758, 248.142, -58.435, -13.462, 141.933, -54.943, -26.838]

SOLUTION:
40.32