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: [93.405, -31.061]

SOLUTION: 31.172

PROBLEM: [-20.155, -42.404]

SOLUTION: -31.28

PROBLEM: [-96.502, 12.006]

SOLUTION:
-42.248