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]: [-73.074, 87.743, 221.875, 126.604, 31.513, 196.863]
[EX A]: 98.587

[EX Q]: [15.293, 221.056, 241.387, 81.3, 102.644, 146.885, -33.65, -36.56, -69.176]
[EX A]: 74.353

[EX Q]: [243.431, 215.316, 205.713, -92.249]
[EX A]:
143.053