TASK DEFINITION: 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.
PROBLEM: [-51.625, 100.25, -75.262, -53.896]

SOLUTION: -20.133

PROBLEM: [243.697, 165.796, 114.518, 207.298, 191.227]

SOLUTION: 184.507

PROBLEM: [-25.508, 206.576, 233.062, 12.247, 129.526, 108.984, 200.861]

SOLUTION:
123.678

