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: [85.011, -20.439, 195.195, 114.286]

Answer: 93.513


Question: [116.074, 213.452, 86.981]

Answer: 138.836


Question: [86.637, 50.043, 235.876, 53.937, 4.286, 149.072, 18.108, 76.563, -64.452]

Answer:
67.786