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:
[20, 17, 12, -4, 33, -71, 17, -43, 72, -53, 80]
answer:
[18.5, 14.5, 4.0, 14.5, -19.0, -27.0, -13.0, 14.5, 9.5, 13.5]


question:
[-76, -63, 15, 34, 34, 62, 23, -67, -17, 84, -47]
answer:
[-69.5, -24.0, 24.5, 34.0, 48.0, 42.5, -22.0, -42.0, 33.5, 18.5]


question:
[65, 92, -66, -26, 22, -30, -81, 63, 78, 45, 28, 18]
answer:

[78.5, 13.0, -46.0, -2.0, -4.0, -55.5, -9.0, 70.5, 61.5, 36.5, 23.0]