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]: [216.087, 41.07, 213.683, 53.822, 31.214]
[EX A]: 111.175

[EX Q]: [65.591, -56.104, -28.389, -22.521]
[EX A]: -10.356

[EX Q]: [184.843, 120.88, -43.605, 34.499, 238.006, 59.091, 32.324, 76.395, 62.601]
[EX A]:
85.004