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].

[-42, 68, -97, 81, 6, 30, 71, 61, -73]
[13.0, -14.5, -8.0, 43.5, 18.0, 50.5, 66.0, -6.0]

[74, 1, 0, -48, -70, -9, -5, -3, -96, 36, 63, -46, 87, 16, -82]
[37.5, 0.5, -24.0, -59.0, -39.5, -7.0, -4.0, -49.5, -30.0, 49.5, 8.5, 20.5, 51.5, -33.0]

[19, -98, -5]

[-39.5, -51.5]