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]: [226.383, 37.978, 174.444, 117.212]
[EX A]: 139.004

[EX Q]: [231.057, 71.527, 201.799, -5.17, -14.963, -35.693]
[EX A]: 74.76

[EX Q]: [85.011, -20.439, 195.195, 114.286]
[EX A]:
93.513