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: [87.258, 29.558, -48.199, -28.615, 46.642]

SOLUTION: 17.329

PROBLEM: [145.697, -40.957, -46.926, -55.065, 177.211, 204.811, -94.192, -47.466]

SOLUTION: 30.389

PROBLEM: [155.894, 62.071, 211.995, 155.068, 206.305, 54.907, -92.807, -69.799, 111.639]

SOLUTION:
88.364