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: [-80, -100, -83, -56, -16, 87]
Example Output: [-90.0, -91.5, -69.5, -36.0, 35.5]

Example Input: [8, -15, 46, 74]
Example Output:
[-3.5, 15.5, 60.0]