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]: [-19.64, 5.69, 102.211, 159.062, 7.744, 242.03, 141.431, 105.364, 40.338]
[EX A]: 87.137

[EX Q]: [214.656, -82.183, 105.038, -34.9, -44.836, 143.236, 183.045, 160.483, 34.398]
[EX A]: 75.437

[EX Q]: [28.819, 144.067, -10.157, 190.992, -56.443, 73.656, -8.101]
[EX A]:
51.833