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]: [84.091, 17.564, 58.169, 6.482, 53.256, 216.444, 171.489]
[EX A]: 86.785

[EX Q]: [-29.727, 150.587, -28.344, 181.096, 0.275, -91.658, 169.609, -21.106, 153.48]
[EX A]: 53.801

[EX Q]: [150.716, 99.101, 227.97, 201.712, 189.544]
[EX A]:
173.809