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].

[-2, 54, 35, -67]
[26.0, 44.5, -16.0]

[59, 57]
[58.0]

[3, 77, 77, -30, 52, 93, 63, 83, -13]

[40.0, 77.0, 23.5, 11.0, 72.5, 78.0, 73.0, 35.0]