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].

Example Input: [54, 27, 20, -9]
Example Output: [40.5, 23.5, 5.5]

Example Input: [13, -16, 74, -48, 53, 39, -49]
Example Output: [-1.5, 29.0, 13.0, 2.5, 46.0, -5.0]

Example Input: [-28, -91, 80, -34, 47, -26]
Example Output:
[-59.5, -5.5, 23.0, 6.5, 10.5]