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: [26.857, -69.553, -37.942]

SOLUTION: -26.879

PROBLEM: [13.21, 76.551, 51.016, 230.763, 149.792, 157.216, 117.414, 144.272, 5.805, 118.165]

SOLUTION: 106.42

PROBLEM: [-93.692, -63.685, 204.753, 2.715, 222.204]

SOLUTION:
54.459