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]: [207.449, 85.584, -55.048, -10.53, 30.755]
[EX A]: 51.642

[EX Q]: [-46.113, 125.487, 133.801, 230.957, 217.606, 147.203, -27.73, 66.455, -96.494]
[EX A]: 83.464

[EX Q]: [144.557, -51.368, 68.403]
[EX A]:
53.864