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]: [-53.388, 31.309, 19.079, -16.926, 242.421, 210.599]
[EX A]: 72.182

[EX Q]: [15.293, 221.056, 241.387, 81.3, 102.644, 146.885, -33.65, -36.56, -69.176]
[EX A]: 74.353

[EX Q]: [161.683, 162.041, 187.429, -79.681, 60.809, 225.806]
[EX A]:
119.681