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.

[-66.676, -7.063, -18.028, 13.407, 54.369, 148.394, -93.155]
4.464

[38.24, 196.576, -84.173, -45.001, 1.607, 170.177, 234.811, -60.183, -91.513]
40.06

[62.233, -14.736, 39.03, 74.345, 18.393]

35.853