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: [-77.226, 44.49]

SOLUTION: -16.368

PROBLEM: [-81.785, -44.121]

SOLUTION: -62.953

PROBLEM: [202.534, -3.362, -55.369, 216.92, 155.911]

SOLUTION:
103.327