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: [-47, 99, -39, 1, 32, 77, 4, 53, -71]

SOLUTION: [26.0, 30.0, -19.0, 16.5, 54.5, 40.5, 28.5, -9.0]

PROBLEM: [-38, 16, 22, 72, 38, -22, 16, -14, 8, -69, 52, -91, -96, 70]

SOLUTION: [-11.0, 19.0, 47.0, 55.0, 8.0, -3.0, 1.0, -3.0, -30.5, -8.5, -19.5, -93.5, -13.0]

PROBLEM: [-99, -1, -55, 52, 49, 33, 29, 23, 74, 59]

SOLUTION:
[-50.0, -28.0, -1.5, 50.5, 41.0, 31.0, 26.0, 48.5, 66.5]