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]: [-13.67, 239.672]
[EX A]: 113.001

[EX Q]: [120.236, 116.311, -13.268]
[EX A]: 74.426

[EX Q]: [51.585, 216.06, 90.446, 240.165, 72.333, -41.801, -67.933, 75.671]
[EX A]:
79.566