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]: [80.346, 228.37, 18.978, -42.02]
[EX A]: 71.419

[EX Q]: [118.319, 70.462]
[EX A]: 94.39

[EX Q]: [87.229, -13.025]
[EX A]:
37.102