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].

[-77, -52, 64, 34, -9, 29, -91, 90, 8, -87, 34, 1, -8]
[-64.5, 6.0, 49.0, 12.5, 10.0, -31.0, -0.5, 49.0, -39.5, -26.5, 17.5, -3.5]

[70, 22, 42, -61, -38, 33, -70]
[46.0, 32.0, -9.5, -49.5, -2.5, -18.5]

[-12, 90, 29, -95, -65, 17, 64, -36, 40, -11]

[39.0, 59.5, -33.0, -80.0, -24.0, 40.5, 14.0, 2.0, 14.5]