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]: [51.02, -71.125, 178.19, -7.234, -99.571, -17.215]
[EX A]: 5.677

[EX Q]: [85.354, -22.629, 51.171, 238.376, 177.126, -90.135, -84.086, 175.426, -80.74]
[EX A]: 49.985

[EX Q]: [222.641, 79.462, -62.481, 74.152, 155.326]
[EX A]:
93.82