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]: [128.916, 203.766]
[EX A]: 166.341

[EX Q]: [-17.604, 15.108, 34.328, -94.608]
[EX A]: -15.694

[EX Q]: [-67.742, -4.212]
[EX A]:
-35.977