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: [9, 62, 4, -63, -50, 9, -19, -42, -20]

SOLUTION: [35.5, 33.0, -29.5, -56.5, -20.5, -5.0, -30.5, -31.0]

PROBLEM: [-85, 41, -29, 47, -31, -38, 91, 82]

SOLUTION: [-22.0, 6.0, 9.0, 8.0, -34.5, 26.5, 86.5]

PROBLEM: [-8, -89, -18, -93]

SOLUTION:
[-48.5, -53.5, -55.5]