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].

[-31, 21, -23]
[-5.0, -1.0]

[16, -51, -26, 81, 86, 96, 72, 44]
[-17.5, -38.5, 27.5, 83.5, 91.0, 84.0, 58.0]

[2, 77, -99, 50, -53, 33, -12, 46, -64, -79, -25]

[39.5, -11.0, -24.5, -1.5, -10.0, 10.5, 17.0, -9.0, -71.5, -52.0]