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: [237.861, 119.858, -8.107, -30.075, 180.524]

SOLUTION: 100.012

PROBLEM: [-42.207, -46.667, 171.095]

SOLUTION: 27.407

PROBLEM: [16.109, 150.522]

SOLUTION:
83.316

