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]: [242.148, 97.472, -15.031, 246.784, 54.233, -27.114]
[EX A]: 99.749

[EX Q]: [88.77, 109.102, -86.446, 207.301, 160.91, -12.956]
[EX A]: 77.78

[EX Q]: [130.629, 28.773, 0.572, 111.989, -62.688, 42.132, -0.458, -9.938, 8.206]
[EX A]:
27.691