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]

[-47, 99, -39, 1, 32, 77, 4, 53, -71]
[26.0, 30.0, -19.0, 16.5, 54.5, 40.5, 28.5, -9.0]

[-57, 83, 91, -26, -2, -81, -48, 89, -86, 4, -48, 49, -85, -22]

[13.0, 87.0, 32.5, -14.0, -41.5, -64.5, 20.5, 1.5, -41.0, -22.0, 0.5, -18.0, -53.5]