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: [135.807, 205.755, 191.805]

SOLUTION: 177.789

PROBLEM: [125.987, 140.164, 103.07, -78.923, -92.734, -96.888]

SOLUTION: 16.779

PROBLEM: [-52.345, 127.618]

SOLUTION:
37.636