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: [84.142, -99.804]

Answer: -7.831


Question: [89.047, 195.178]

Answer: 142.112


Question: [-54.935, 43.542, -4.185, 73.039, -21.628, 212.972, 239.247]

Answer:
69.722