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:
[73, -32, -75, 39, -10, -15, 90, -89, -56, 40, -66, -89, -34]

Ex Output:
[20.5, -53.5, -18.0, 14.5, -12.5, 37.5, 0.5, -72.5, -8.0, -13.0, -77.5, -61.5]


Ex Input:
[-77, -52, 64, 34, -9, 29, -91, 90, 8, -87, 34, 1, -8]

Ex Output:
[-64.5, 6.0, 49.0, 12.5, 10.0, -31.0, -0.5, 49.0, -39.5, -26.5, 17.5, -3.5]


Ex Input:
[4, 21, -81, 96, 39, -8, -73, 1, 22, -10, -85]

Ex Output:

[12.5, -30.0, 7.5, 67.5, 15.5, -40.5, -36.0, 11.5, 6.0, -47.5]