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].

[84, -12, 27, 10, 23, -64, -8, 23, 3, -90, 87, 4, -74]
[36.0, 7.5, 18.5, 16.5, -20.5, -36.0, 7.5, 13.0, -43.5, -1.5, 45.5, -35.0]

[28, -83, -37, -51]
[-27.5, -60.0, -44.0]

[-68, -98, -34, -2, -54, -32, -39]

[-83.0, -66.0, -18.0, -28.0, -43.0, -35.5]