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].

[-26, -40, -22, -65, -61, 16, 26, 51, -24]
[-33.0, -31.0, -43.5, -63.0, -22.5, 21.0, 38.5, 13.5]

[-100, -100, -39, 13, 24, -2, 77, 37, -20, -38, 18, 55]
[-100.0, -69.5, -13.0, 18.5, 11.0, 37.5, 57.0, 8.5, -29.0, -10.0, 36.5]

[78, -83, 35]

[-2.5, -24.0]