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: [-27, 83, -67, 51, -57, -18, -59, 85, -84, 68, 16, 61]

SOLUTION: [28.0, 8.0, -8.0, -3.0, -37.5, -38.5, 13.0, 0.5, -8.0, 42.0, 38.5]

PROBLEM: [-2, -57, 85, -7, 81, 57, -60, -87, -18]

SOLUTION: [-29.5, 14.0, 39.0, 37.0, 69.0, -1.5, -73.5, -52.5]

PROBLEM: [30, -20, 42, 57, -8, 16]

SOLUTION:
[5.0, 11.0, 49.5, 24.5, 4.0]