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: [-15, -37, -91, -88, -52, -30, 63, 69, -36, 41, 39, -49, 7, -57, -37]

SOLUTION: [-26.0, -64.0, -89.5, -70.0, -41.0, 16.5, 66.0, 16.5, 2.5, 40.0, -5.0, -21.0, -25.0, -47.0]

PROBLEM: [83, -87, 28, 17, 96, 39, -82]

SOLUTION: [-2.0, -29.5, 22.5, 56.5, 67.5, -21.5]

PROBLEM: [-25, 95, 99, 87, 82, -76, 21, 49, 31]

SOLUTION:
[35.0, 97.0, 93.0, 84.5, 3.0, -27.5, 35.0, 40.0]