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: [7, -25, 16, 74, -18]

A: [-9.0, -4.5, 45.0, 28.0]
****
Q: [9, 4, 67]

A:
[6.5, 35.5]
****