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].

[-30, 37, -83, -63, 52, 22, 80, 75, -98, -17]
[3.5, -23.0, -73.0, -5.5, 37.0, 51.0, 77.5, -11.5, -57.5]

[-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]

[-82, 4, 8, -19, 59, 70, -35]

[-39.0, 6.0, -5.5, 20.0, 64.5, 17.5]