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].

[-83, -69, -51, 12, 67, 99, 74, 77, -6, -81, -13, -70, -34, -8, 25]
[-76.0, -60.0, -19.5, 39.5, 83.0, 86.5, 75.5, 35.5, -43.5, -47.0, -41.5, -52.0, -21.0, 8.5]

[84, 76, -56, 90, -63, 11, -25, 44, -16, -86, -51, -87, -7, 38]
[80.0, 10.0, 17.0, 13.5, -26.0, -7.0, 9.5, 14.0, -51.0, -68.5, -69.0, -47.0, 15.5]

[-58, 46, -97, -65, 68, 2, -47, -11, -39, 48, 85, -61, -46, -48, 51]

[-6.0, -25.5, -81.0, 1.5, 35.0, -22.5, -29.0, -25.0, 4.5, 66.5, 12.0, -53.5, -47.0, 1.5]