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]: [89.583, 153.453, 20.381, -17.436, -31.071, 91.041, 198.063]
[EX A]: 72.002

[EX Q]: [80.493, 235.968, -57.18, 38.066, -86.511, 193.785, 156.598, 45.139, 61.791, 141.607]
[EX A]: 80.976

[EX Q]: [58.158, 80.899, 176.016, 231.597, -38.907, -25.986, 183.774, 43.886]
[EX A]:
88.68