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: [217.301, 19.358, -21.02, -51.249]

SOLUTION: 41.098

PROBLEM: [187.54, -56.697, 55.301, 235.071, 176.682, 103.554, -35.29, 84.215]

SOLUTION: 93.797

PROBLEM: [125.883, -66.251, -26.043, 146.204, 155.806]

SOLUTION:
67.12