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]: [72.326, -74.6, 127.566, -54.848, 198.529, -44.061, -28.155]
[EX A]: 28.108

[EX Q]: [20.796, 39.383, -26.46, -27.224, 89.591, 87.502, 211.781, 127.87, 223.38]
[EX A]: 82.958

[EX Q]: [132.337, 22.984, 134.637, -86.549, 21.826, 186.962, 51.9, 247.067, 27.577, 242.599]
[EX A]:
98.134