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]: [-77, 14, 56, -86, -9, 71, -2, -1, -74, 37, 39, 53]
[A]: [-31.5, 35.0, -15.0, -47.5, 31.0, 34.5, -1.5, -37.5, -18.5, 38.0, 46.0]


[Q]: [-2, 54, 35, -67]
[A]: [26.0, 44.5, -16.0]


[Q]: [21, -42, -70, -68, 81, 89, 86, -60, -59]
[A]:
[-10.5, -56.0, -69.0, 6.5, 85.0, 87.5, 13.0, -59.5]