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].

[83, 67, 5, -15]
[75.0, 36.0, -5.0]

[38, 32, -3, 13, 55, 73]
[35.0, 14.5, 5.0, 34.0, 64.0]

[83, 68, 64, 59]

[75.5, 66.0, 61.5]