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]: [99.278, 72.353, -21.292]
[EX A]: 50.113

[EX Q]: [84.13, 59.186, 115.606]
[EX A]: 86.307

[EX Q]: [-18.763, 211.572, 124.021, -2.526, -44.499, 75.194, 64.18, 62.486]
[EX A]:
58.958