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]: [-39, 16, -88, -73, 52, -75, -23, -37, 21]
[A]: [-11.5, -36.0, -80.5, -10.5, -11.5, -49.0, -30.0, -8.0]


[Q]: [58, -99]
[A]: [-20.5]


[Q]: [-88, -84, -37, -39, -3, 50, 7, 42, -66]
[A]:
[-86.0, -60.5, -38.0, -21.0, 23.5, 28.5, 24.5, -12.0]