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]: [-2.869, -88.698, 21.318]
[EX A]: -23.416

[EX Q]: [243.697, 165.796, 114.518, 207.298, 191.227]
[EX A]: 184.507

[EX Q]: [-85.623, 231.544, 191.775, 27.471, 44.249, 23.857, 116.214]
[EX A]:
78.498