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: [57, 81, -99]

SOLUTION: [69.0, -9.0]

PROBLEM: [-79, -48, 58, -34, 17]

SOLUTION: [-63.5, 5.0, 12.0, -8.5]

PROBLEM: [-42, 65, -40, 67, 43, -44, -24, -91, 14, -99, 44, -84]

SOLUTION:
[11.5, 12.5, 13.5, 55.0, -0.5, -34.0, -57.5, -38.5, -42.5, -27.5, -20.0]