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.

[125.987, 140.164, 103.07, -78.923, -92.734, -96.888]
16.779

[3.556, 65.177]
34.366

[236.81, -48.495, -89.669, -95.35, 167.541, 233.959, -62.852]

48.849