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]: [227.874, 175.626, 193.094, 63.963, 139.938]
[EX A]: 160.099

[EX Q]: [238.315, 168.986, -67.694]
[EX A]: 113.202

[EX Q]: [113.433, 173.99]
[EX A]:
143.712