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].

[68, -66]
[1.0]

[40, 34, -39]
[37.0, -2.5]

[24, -39]

[-7.5]