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: [44, -69, 2, -20, -20]

SOLUTION: [-12.5, -33.5, -9.0, -20.0]

PROBLEM: [-64, 87, -84, 96]

SOLUTION:
[11.5, 1.5, 6.0]