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: [58, -15]

A: [21.5]
****
Q: [-84, -19]

A: [-51.5]
****
Q: [34, -39, 27]

A:
[-2.5, -6.0]
****