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: [19, -40, -19, 7, 57, 87, -71, 17, 29, 60, 14, 61, 10, 71, 93]

SOLUTION: [-10.5, -29.5, -6.0, 32.0, 72.0, 8.0, -27.0, 23.0, 44.5, 37.0, 37.5, 35.5, 40.5, 82.0]

PROBLEM: [-96, -42, -34, 57, -47, -54, 40, 97, 16, -76, -31, -24, 25, 81, -7]

SOLUTION: [-69.0, -38.0, 11.5, 5.0, -50.5, -7.0, 68.5, 56.5, -30.0, -53.5, -27.5, 0.5, 53.0, 37.0]

PROBLEM: [20, -83, 94, -97, 78, -63, 91]

SOLUTION:
[-31.5, 5.5, -1.5, -9.5, 7.5, 14.0]