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.

[Q]: [138.63, 106.759, 86.625]
[A]: 110.671


[Q]: [-21.77, 172.703, -31.807, 129.587, 84.624, 14.279]
[A]: 57.936


[Q]: [-81.589, 130.813, 56.576, 138.889, 113.52, 227.2, 172.61, -6.932, -90.153]
[A]:
73.437