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: [-42.956, 89.597, -60.477, 101.972, 77.479]

Answer: 33.123


Question: [113.238, 247.072, -31.448, -33.563, 74.519, 67.841]

Answer: 72.943


Question: [137.512, 157.842]

Answer:
147.677