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: [-25, 29, 0, -66, -92, 11, -89, -35, 80, -69, 81, -69]

SOLUTION: [2.0, 14.5, -33.0, -79.0, -40.5, -39.0, -62.0, 22.5, 5.5, 6.0, 6.0]

PROBLEM: [-48, -86, 13, 21, 39, -52, 70, 6, 66, 58, -3, 88, -64]

SOLUTION: [-67.0, -36.5, 17.0, 30.0, -6.5, 9.0, 38.0, 36.0, 62.0, 27.5, 42.5, 12.0]

PROBLEM: [-64, 38, 16, -100, 94, -48, -23, 51, 50]

SOLUTION:
[-13.0, 27.0, -42.0, -3.0, 23.0, -35.5, 14.0, 50.5]