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]: [9.392, -80.549]
[EX A]: -35.579

[EX Q]: [30.448, 132.545, 166.304, 202.59]
[EX A]: 132.972

[EX Q]: [111.845, -62.659, 185.517, 113.923, 86.504, 63.083, 201.608, -77.541]
[EX A]:
77.785