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]: [224.567, -42.213, 232.017]
[EX A]: 138.124

[EX Q]: [-89.318, 247.959, 25.441, -92.763, 172.246, -57.286, 181.58]
[EX A]: 55.408

[EX Q]: [-36.981, 147.892]
[EX A]:
55.456