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: [165.242, 50.738, -34.087, 77.742, -21.241, -4.541]

SOLUTION: 38.976

PROBLEM: [73.331, 85.459, 59.798, -35.019]

SOLUTION: 45.892

PROBLEM: [223.927, -44.12, 0.828, -54.407]

SOLUTION:
31.557