instruction:
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].
question:
[-39, -78, -10, -56, 67, 4, 97, 31]
answer:
[-58.5, -44.0, -33.0, 5.5, 35.5, 50.5, 64.0]


question:
[59, -19, -85]
answer:
[20.0, -52.0]


question:
[37, -45, -72, 12, 22, 41, -65, 27, 99, 6, 9, 86]
answer:

[-4.0, -58.5, -30.0, 17.0, 31.5, -12.0, -19.0, 63.0, 52.5, 7.5, 47.5]