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: [-51.625, 100.25, -75.262, -53.896]

Answer: -20.133


Question: [-98.163, -66.763, 149.544, -89.893, -10.155]

Answer: -23.086


Question: [55.797, 237.758]

Answer:
146.778