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]: [238.315, 168.986, -67.694]
[EX A]: 113.202

[EX Q]: [-51.709, 7.971, 56.819, 147.653, 82.016, 33.283, 17.84, -45.317, 152.854, 6.908]
[EX A]: 40.832

[EX Q]: [-51.364, 36.89, -36.418, 79.784, 17.869, -4.355, 159.453]
[EX A]:
28.837