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: [131.164, 99.999, 138.488, 57.264, -40.069, -82.402, -42.836]

SOLUTION: 37.373

PROBLEM: [214.036, 24.752, 106.748, 206.9, 42.432, 233.646]

SOLUTION: 138.086

PROBLEM: [139.326, 10.384, -67.466, 246.644, 122.032, -63.536, -26.562, -64.305]

SOLUTION:
37.065