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].

[57, 81, -99]
[69.0, -9.0]

[-99, 43, 6, 55, 74, -46, 24, -6, -51, 47, 32]
[-28.0, 24.5, 30.5, 64.5, 14.0, -11.0, 9.0, -28.5, -2.0, 39.5]

[82, -65, -50, -31, -35, 10, 78, 88, -10, -19, -83, -31, 31, -69, 68]

[8.5, -57.5, -40.5, -33.0, -12.5, 44.0, 83.0, 39.0, -14.5, -51.0, -57.0, 0.0, -19.0, -0.5]