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]: [102.524, 88.129, 196.972]
[EX A]: 129.208

[EX Q]: [165.647, 110.893, -83.152, -56.699, 19.53, 48.825, -64.043, 199.192, 249.46, 244.789]
[EX A]: 83.444

[EX Q]: [-71.88, -65.484, -58.071, 65.985, 220.421, -67.791, 55.046, -59.456]
[EX A]:
2.346