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]: [198.958, 97.355]
[EX A]: 148.156

[EX Q]: [131.164, 99.999, 138.488, 57.264, -40.069, -82.402, -42.836]
[EX A]: 37.373

[EX Q]: [-68.707, 212.467, 153.116, 81.234, -62.635, -89.076, 58.18, -54.684]
[EX A]:
28.737