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: [-40.246, -7.512, 174.245, -98.6]

SOLUTION: 6.972

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: [-5.463, 75.352, 167.453]

SOLUTION:
79.114