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: [-40, 54]
Example Output: [7.0]

Example Input: [-18, 63, 49, 17, 1]
Example Output: [22.5, 56.0, 33.0, 9.0]

Example Input: [58, -86, -37, -91, 28]
Example Output:
[-14.0, -61.5, -64.0, -31.5]