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: [41, -66, -51, -81, 57, -30, 7]

SOLUTION: [-12.5, -58.5, -66.0, -12.0, 13.5, -11.5]

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: [57, -26, -99, 61, 13, 31]

SOLUTION:
[15.5, -62.5, -19.0, 37.0, 22.0]