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]: [-19.13, 98.86, 158.686, 230.23]
[EX A]: 117.161

[EX Q]: [-51.496, 56.177, 55.554, -17.425, -6.185, 3.721]
[EX A]: 6.724

[EX Q]: [185.594, 89.215, 19.941, 23.299, 47.251]
[EX A]:
73.06