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]: [89.583, 153.453, 20.381, -17.436, -31.071, 91.041, 198.063]
[EX A]: 72.002

[EX Q]: [208.757, -63.857, 124.458, 25.069, -39.093, -85.924, 112.747]
[EX A]: 40.308

[EX Q]: [-31.233, 68.571, 195.487, 108.423, 212.897]
[EX A]:
110.829