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: [-44.471, 208.445, 208.318, -34.134]

SOLUTION: 84.54

PROBLEM: [80.493, 235.968, -57.18, 38.066, -86.511, 193.785, 156.598, 45.139, 61.791, 141.607]

SOLUTION: 80.976

PROBLEM: [47.009, 157.824, 193.279, 172.282]

SOLUTION:
142.598