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].

Q: [57, -26, -99, 61, 13, 31]

A: [15.5, -62.5, -19.0, 37.0, 22.0]
****
Q: [11, 88]

A: [49.5]
****
Q: [-18, 30, 59, -65, 4, 58, 64, -17, 5]

A:
[6.0, 44.5, -3.0, -30.5, 31.0, 61.0, 23.5, -6.0]
****