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].

[40, -60, 97, -26, 39, -5]
[-10.0, 18.5, 35.5, 6.5, 17.0]

[-69, -35, 56, 64]
[-52.0, 10.5, 60.0]

[-10, 40, -22, 73, 73, -54, -74, 84, 61, 73, -74, -1, 38]

[15.0, 9.0, 25.5, 73.0, 9.5, -64.0, 5.0, 72.5, 67.0, -0.5, -37.5, 18.5]