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].

[17, -31, 89, -43, 58, -50, 2, -61]
[-7.0, 29.0, 23.0, 7.5, 4.0, -24.0, -29.5]

[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]

[-44, 99, 53, -83, 28, -91, 54]

[27.5, 76.0, -15.0, -27.5, -31.5, -18.5]