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]: [-17.026, 165.89]
[EX A]: 74.432

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

[EX Q]: [-51.918, 100.084, -74.934, -95.889]
[EX A]:
-30.664