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: [-80, 99, -49, -90, 63, 15, 39, -5, -17]

SOLUTION: [9.5, 25.0, -69.5, -13.5, 39.0, 27.0, 17.0, -11.0]

PROBLEM: [-12, -11, -13, 37, 73, -7, -15, 62, 1, 5, 93, -30, 21, 29, 99]

SOLUTION: [-11.5, -12.0, 12.0, 55.0, 33.0, -11.0, 23.5, 31.5, 3.0, 49.0, 31.5, -4.5, 25.0, 64.0]

PROBLEM: [-23, 98, -31, -18, 12, 82, -14, 62, 16, 51, 32, -19, -44, 25, 29]

SOLUTION:
[37.5, 33.5, -24.5, -3.0, 47.0, 34.0, 24.0, 39.0, 33.5, 41.5, 6.5, -31.5, -9.5, 27.0]