You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

[1,3,5]
Solution: 3.000
Why? The mean of the input list is (1+3+5)/3, which equals 3. This is a good example.

New input: [192.729, -10.365, -4.816, -39.407, -59.007]
Solution:
15.827