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]: [34.678, 109.562]
[EX A]: 72.12

[EX Q]: [-57.838, -63.616, 49.646, -45.262, 73.1, -82.399, 47.168]
[EX A]: -11.314

[EX Q]: [222.685, 138.844, -57.175]
[EX A]:
101.451