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.

[EX Q]: [71.91, 41.513]
[EX A]: 56.712

[EX Q]: [9.828, 248.054, 20.871, 99.749, 52.797, -86.856, 65.438, 53.627]
[EX A]: 57.939

[EX Q]: [-58.535, 21.013, -69.721, 64.913, 126.828, 122.182, -58.45, 27.371]
[EX A]:
21.95