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: [55, -33, 9, 23, -18, -6, -90, -6, -78]
Example Output: [11.0, -12.0, 16.0, 2.5, -12.0, -48.0, -48.0, -42.0]

Example Input: [-27, -64]
Example Output: [-45.5]

Example Input: [-1, -32, -37, 31, 83]
Example Output:
[-16.5, -34.5, -3.0, 57.0]