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.

[-1.833, 218.553, -61.132, -19.027, 87.034]
44.719

[-50.208, 248.001, -92.993, -67.867, -25.771, 57.557]
11.453

[-43.263, -3.004, 123.143]

25.625