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: [-34.026, 86.773, 149.194, 228.14]

Answer: 107.52


Question: [15.748, -13.369, -79.943, -2.78, 169.174, 101.44, -84.923, 189.589, 83.541, -37.629]

Answer: 34.085


Question: [84.38, 108.119, 207.756, -40.156, -86.21, 20.753, 30.957, 90.529, -39.151]

Answer:
41.886