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].

[89, -29, -43, 99, -63, -80, -73, -50, -58]
[30.0, -36.0, 28.0, 18.0, -71.5, -76.5, -61.5, -54.0]

[10, 78, -51, -20, 48, 55, -72, -1]
[44.0, 13.5, -35.5, 14.0, 51.5, -8.5, -36.5]

[77, 74, -75, -34, 8]

[75.5, -0.5, -54.5, -13.0]