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]: [72, -80]
[A]: [-4.0]


[Q]: [-12, -2, 33, -26, 37, -82, -14, 56, -39, 57, 2]
[A]: [-7.0, 15.5, 3.5, 5.5, -22.5, -48.0, 21.0, 8.5, 9.0, 29.5]


[Q]: [20, -4, -69, -47, 7, -17, -53, 90]
[A]:
[8.0, -36.5, -58.0, -20.0, -5.0, -35.0, 18.5]