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

SOLUTION: 30.389

PROBLEM: [139.238, 225.164, -21.563, -22.339, -77.136, 96.772, -40.208, 121.974, 228.852]

SOLUTION: 72.306

PROBLEM: [-84.948, 141.903, 172.802, 217.268]

SOLUTION:
111.756