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]: [84.527, 159.538, -20.208, 42.181, -12.587, -86.549, 131.349, 63.615, 150.304]
[EX A]: 56.908

[EX Q]: [231.159, 217.795, 230.676, -11.951, -82.697, 31.413]
[EX A]: 102.732

[EX Q]: [117.3, 139.873, -78.605, -32.703, 13.848, 129.699, 125.607]
[EX A]:
59.288