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: [233.742, -71.075]

SOLUTION: 81.333

PROBLEM: [195.019, 144.893, 32.821, -21.855, 136.755]

SOLUTION: 97.527

PROBLEM: [159.028, 176.099, -33.266]

SOLUTION:
100.62