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].

[-81, 99, -79, 70, 91]
[9.0, 10.0, -4.5, 80.5]

[6, 80, -33, -48, -65, 9, 53, 34, 54]
[43.0, 23.5, -40.5, -56.5, -28.0, 31.0, 43.5, 44.0]

[85, -28, 13, 30, 50, 96, 17, 70, 56, -29, 86, 52, -67]

[28.5, -7.5, 21.5, 40.0, 73.0, 56.5, 43.5, 63.0, 13.5, 28.5, 69.0, -7.5]