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]: [87.258, 29.558, -48.199, -28.615, 46.642]
[EX A]: 17.329

[EX Q]: [127.522, 232.86, 46.593]
[EX A]: 135.658

[EX Q]: [115.492, 195.984, 191.814, -42.812, 103.344, 158.29, 104.369]
[EX A]:
118.069