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].

[20, 57, 16, -66, -30, -89, 64, -22, 7, -36, -19, -71]
[38.5, 36.5, -25.0, -48.0, -59.5, -12.5, 21.0, -7.5, -14.5, -27.5, -45.0]

[55, -46, 64, -40]
[4.5, 9.0, 12.0]

[-58, 10, -50, 94, -60, 60, -47, 35]

[-24.0, -20.0, 22.0, 17.0, 0.0, 6.5, -6.0]