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.
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Question: [26.857, -69.553, -37.942]

Answer: -26.879


Question: [121.069, 12.661, 159.825, -39.645, 6.609, 156.735, 110.054, 112.875]

Answer: 80.023


Question: [25.889, -89.314, 75.482, -3.462, -93.25, -60.856, 16.359]

Answer:
-18.45