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: [-67, -78, -72, 9, -90, 64, 13, -2, -61, 45, 36, -7, -25, 68]

SOLUTION: [-72.5, -75.0, -31.5, -40.5, -13.0, 38.5, 5.5, -31.5, -8.0, 40.5, 14.5, -16.0, 21.5]

PROBLEM: [74, 1, 0, -48, -70, -9, -5, -3, -96, 36, 63, -46, 87, 16, -82]

SOLUTION: [37.5, 0.5, -24.0, -59.0, -39.5, -7.0, -4.0, -49.5, -30.0, 49.5, 8.5, 20.5, 51.5, -33.0]

PROBLEM: [-13, 40, -89, 73, 19, -55, 67, -64, 10, -46, -58, -3, -22, -57, -86]

SOLUTION:
[13.5, -24.5, -8.0, 46.0, -18.0, 6.0, 1.5, -27.0, -18.0, -52.0, -30.5, -12.5, -39.5, -71.5]