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: [-93, -90, -54, 88, 28, 87, 86, 83, 50, -6, -87, 97, -91, 5, -38]

SOLUTION: [-91.5, -72.0, 17.0, 58.0, 57.5, 86.5, 84.5, 66.5, 22.0, -46.5, 5.0, 3.0, -43.0, -16.5]

PROBLEM: [91, -52, -63, 41]

SOLUTION: [19.5, -57.5, -11.0]

PROBLEM: [-71, 46, -28, 31]

SOLUTION:
[-12.5, 9.0, 1.5]