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]: [-7.775, 55.997, 216.046]
[EX A]: 88.089

[EX Q]: [208.678, 219.921, 113.318, 23.83, -42.88, -32.702, -36.191, 117.84, 91.988]
[EX A]: 73.756

[EX Q]: [196.039, 3.13, 126.743, 27.727]
[EX A]:
88.41