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:
[-42, 68, -97, 81, 6, 30, 71, 61, -73]

Ex Output:
[13.0, -14.5, -8.0, 43.5, 18.0, 50.5, 66.0, -6.0]


Ex Input:
[20, 57, 16, -66, -30, -89, 64, -22, 7, -36, -19, -71]

Ex Output:
[38.5, 36.5, -25.0, -48.0, -59.5, -12.5, 21.0, -7.5, -14.5, -27.5, -45.0]


Ex Input:
[84, -12, 27, 10, 23, -64, -8, 23, 3, -90, 87, 4, -74]

Ex Output:

[36.0, 7.5, 18.5, 16.5, -20.5, -36.0, 7.5, 13.0, -43.5, -1.5, 45.5, -35.0]