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]: [-33.746, 231.27, 122.704, -25.907, -56.96]
[EX A]: 47.472

[EX Q]: [-24.069, 49.942, -56.199, 147.337, 81.429, 198.62, -91.886, 33.842, -16.712, -51.661]
[EX A]: 27.064

[EX Q]: [-65.453, 56.953, -25.228]
[EX A]:
-11.243