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].

[-71, -78, -84, 6, 99, 66, -90, -36, -77, -56, 19, -59, 71]
[-74.5, -81.0, -39.0, 52.5, 82.5, -12.0, -63.0, -56.5, -66.5, -18.5, -20.0, 6.0]

[41, -16, -86, -96, -67, 28, -89]
[12.5, -51.0, -91.0, -81.5, -19.5, -30.5]

[30, -5, 69, -78, -100]

[12.5, 32.0, -4.5, -89.0]