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]: [37.853, 78.283, 143.128, 82.561, 181.661, -89.154, 50.037]
[EX A]: 69.196

[EX Q]: [59.251, 198.593]
[EX A]: 128.922

[EX Q]: [-80.894, 29.059]
[EX A]:
-25.918