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]: [213.2, 159.287, 214.859, 189.464, 185.706, -85.847, 215.647, 8.545]
[EX A]: 137.608

[EX Q]: [108.26, -20.681, 127.479, -29.352]
[EX A]: 46.426

[EX Q]: [-26.659, -76.107, -52.964]
[EX A]:
-51.91