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: [-56, 71, 54, -28, 75, -89, -82, 39, -12, 81, 37, 35, 39, 66, 60]

SOLUTION: [7.5, 62.5, 13.0, 23.5, -7.0, -85.5, -21.5, 13.5, 34.5, 59.0, 36.0, 37.0, 52.5, 63.0]

PROBLEM: [77, 66, 11]

SOLUTION: [71.5, 38.5]

PROBLEM: [78, 24, 68, -66, 44, 56, 11, -59, 86, -33, -74]

SOLUTION:
[51.0, 46.0, 1.0, -11.0, 50.0, 33.5, -24.0, 13.5, 26.5, -53.5]