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]

[76, -70, 13, 17, 80, 21, 62]
[3.0, -28.5, 15.0, 48.5, 50.5, 41.5]

[-30, 85, -10, 68, 64, 9, 5]

[27.5, 37.5, 29.0, 66.0, 36.5, 7.0]