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]: [-90.211, -60.08, 99.87, 18.704, 197.269, 173.722, 168.875]
[EX A]: 72.593

[EX Q]: [224.567, -42.213, 232.017]
[EX A]: 138.124

[EX Q]: [73.139, 68.907, -20.514, 159.682, 225.027, 169.52]
[EX A]:
112.627