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]: [-67.542, 65.934, 223.305, 25.694, 159.037]
[EX A]: 81.286

[EX Q]: [-4.749, 102.787, -45.229, 184.111, 221.888, 22.727, 20.887, 34.094]
[EX A]: 67.065

[EX Q]: [106.007, 158.122, 217.652, 78.8, -9.087, 63.342, 6.456]
[EX A]:
88.756