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].

[-81, -97, 24, 13, -42, -46, -6, 31]
[-89.0, -36.5, 18.5, -14.5, -44.0, -26.0, 12.5]

[43, 84]
[63.5]

[-31, 5, -24]

[-13.0, -9.5]