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].

[56, -71, -75, 36, 77, -13, 72, 40, -43]
[-7.5, -73.0, -19.5, 56.5, 32.0, 29.5, 56.0, -1.5]

[55, -82, 13, 11, -14, 17]
[-13.5, -34.5, 12.0, -1.5, 1.5]

[18, -91, 28]

[-36.5, -31.5]