TASK DEFINITION: In this task you are given a list of numbers and you need to find the average of each two consecutive values. The average of two numbers a and b is calculated as: (a + b) /2. The output should be a list of the averages of each two consecutive values. A list is presented with two brackets and comma-separated values, like: [1,2,3].
PROBLEM: [-59, 35, 54, 98, 61, -21, 64, 91, -17, -70]

SOLUTION: [-12.0, 44.5, 76.0, 79.5, 20.0, 21.5, 77.5, 37.0, -43.5]

PROBLEM: [75, 87, -2, 42, -20, -50, 51]

SOLUTION: [81.0, 42.5, 20.0, 11.0, -35.0, 0.5]

PROBLEM: [-87, -65, -2, 19, -15, 49, 77, -15, -54, 61, 74, 23]

SOLUTION:
[-76.0, -33.5, 8.5, 2.0, 17.0, 63.0, 31.0, -34.5, 3.5, 67.5, 48.5]