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:
[42, -57, 62, 14, -89, 19, 56, -90, 32, 21, -2, -9]
answer:
[-7.5, 2.5, 38.0, -37.5, -35.0, 37.5, -17.0, -29.0, 26.5, 9.5, -5.5]


question:
[76, 77, 36, 41]
answer:
[76.5, 56.5, 38.5]


question:
[-23, 69, -75]
answer:

[23.0, -3.0]