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].

Ex Input:
[-50, -74, 52, -21, 29, -11]

Ex Output:
[-62.0, -11.0, 15.5, 4.0, 9.0]


Ex Input:
[52, -7, -11, 69]

Ex Output:
[22.5, -9.0, 29.0]


Ex Input:
[79, 34, -79, 28, -83, 28, -34, 83, -75]

Ex Output:

[56.5, -22.5, -25.5, -27.5, -27.5, -3.0, 24.5, 4.0]