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].

[40, 77, 36, 50, 36, 89, -13, 75, -57, -13, 15, 42, 72, 21]
[58.5, 56.5, 43.0, 43.0, 62.5, 38.0, 31.0, 9.0, -35.0, 1.0, 28.5, 57.0, 46.5]

[10, 70, 61, -80, 6, 39, -83, 31, -25]
[40.0, 65.5, -9.5, -37.0, 22.5, -22.0, -26.0, 3.0]

[69, -16, 19, -51, 15, 29, 84, -56, 24, 55, 81, -19]

[26.5, 1.5, -16.0, -18.0, 22.0, 56.5, 14.0, -16.0, 39.5, 68.0, 31.0]