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.
--------
Question: [-1.31, 169.522, -26.172, 111.289]

Answer: 63.332


Question: [-63.278, 115.92, 179.699, 73.157]

Answer: 76.374


Question: [-19.591, 52.857, -15.963]

Answer:
5.768