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]: [138.602, 158.458, 241.327, 194.509, 169.45, -56.151]
[EX A]: 141.032

[EX Q]: [75.879, 43.123]
[EX A]: 59.501

[EX Q]: [33.387, -28.533, 50.331]
[EX A]:
18.395