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: [-68, 22, -96, 77, 86, -19, 90, 65, -47, -15, 8, 17, -64, -18, 64]

SOLUTION: [-23.0, -37.0, -9.5, 81.5, 33.5, 35.5, 77.5, 9.0, -31.0, -3.5, 12.5, -23.5, -41.0, 23.0]

PROBLEM: [-79, 66, 43, -67, -68, -15, 18, 22, -100, 77, -4, 30, 22]

SOLUTION: [-6.5, 54.5, -12.0, -67.5, -41.5, 1.5, 20.0, -39.0, -11.5, 36.5, 13.0, 26.0]

PROBLEM: [-23, -77, -19, -6, 86, -61, 58, -52]

SOLUTION:
[-50.0, -48.0, -12.5, 40.0, 12.5, -1.5, 3.0]