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: [-36.318, 176.066, 36.435, 132.732, -15.887, -24.851, 169.963, -98.796, 38.818]

SOLUTION: 42.018

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

SOLUTION: 41.098

PROBLEM: [165.942, -61.703, 148.797, 42.99, 219.157, 13.789, 79.301, -66.349, 29.626]

SOLUTION:
63.506