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: [141.597, -13.558, -15.987, -52.44, 77.914]

SOLUTION: 27.505

PROBLEM: [84.091, 17.564, 58.169, 6.482, 53.256, 216.444, 171.489]

SOLUTION: 86.785

PROBLEM: [-76.779, 235.989, 128.177, 16.053, 54.458, -67.415]

SOLUTION:
48.414