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]: [81, 73]
[A]: [77.0]


[Q]: [42, -57, 62, 14, -89, 19, 56, -90, 32, 21, -2, -9]
[A]: [-7.5, 2.5, 38.0, -37.5, -35.0, 37.5, -17.0, -29.0, 26.5, 9.5, -5.5]


[Q]: [55, 59, 85, 58]
[A]:
[57.0, 72.0, 71.5]