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: [-31, 39, -47]
Example Output: [4.0, -4.0]

Example Input: [-10, -49, -49, 14, 92, 63, -10, 73]
Example Output: [-29.5, -49.0, -17.5, 53.0, 77.5, 26.5, 31.5]

Example Input: [9, -7, 69, 72, 79, 3, 15, -95, -21]
Example Output:
[1.0, 31.0, 70.5, 75.5, 41.0, 9.0, -40.0, -58.0]