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]: [-21.77, 172.703, -31.807, 129.587, 84.624, 14.279]
[EX A]: 57.936

[EX Q]: [93.405, -31.061]
[EX A]: 31.172

[EX Q]: [231.352, -24.17]
[EX A]:
103.591

