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: [-27, -64]

A: [-45.5]
****
Q: [-77, 76, 21, 100, 19]

A: [-0.5, 48.5, 60.5, 59.5]
****
Q: [-20, 63]

A:
[21.5]
****