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]: [-98.809, 139.617, 148.76, -52.034, 161.969, 117.253, 16.668, 164.37, -75.91, -31.599]
[EX A]: 49.028

[EX Q]: [-42.207, -46.667, 171.095]
[EX A]: 27.407

[EX Q]: [-22.937, 71.629, 248.76, 166.523, 130.644, 15.175, 117.075, 119.032]
[EX A]:
105.738