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, -42, 24, 40, 59, 88, -75, -11, 9, -56, -92, -80]
[7.5, -9.0, 32.0, 49.5, 73.5, 6.5, -43.0, -1.0, -23.5, -74.0, -86.0]

[20, 17, 12, -4, 33, -71, 17, -43, 72, -53, 80]
[18.5, 14.5, 4.0, 14.5, -19.0, -27.0, -13.0, 14.5, 9.5, 13.5]

[23, 39, -40, -1, 31, 63, -26, -60, -32, -33, 98]

[31.0, -0.5, -20.5, 15.0, 47.0, 18.5, -43.0, -46.0, -32.5, 32.5]