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]: [22.306, 72.768, 218.947, 52.973, 100.121, 157.59, -92.109]
[EX A]: 76.085

[EX Q]: [176.017, -45.57]
[EX A]: 65.224

[EX Q]: [-39.639, 125.531, 174.5, 198.408]
[EX A]:
114.7