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: [-81, 99, -79, 70, 91]

SOLUTION: [9.0, 10.0, -4.5, 80.5]

PROBLEM: [-71, -78, -84, 6, 99, 66, -90, -36, -77, -56, 19, -59, 71]

SOLUTION: [-74.5, -81.0, -39.0, 52.5, 82.5, -12.0, -63.0, -56.5, -66.5, -18.5, -20.0, 6.0]

PROBLEM: [-99, 14, 81, 16, -44, 69, 10, 83, -93, -48, -85]

SOLUTION:
[-42.5, 47.5, 48.5, -14.0, 12.5, 39.5, 46.5, -5.0, -70.5, -66.5]