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:
[-39, 16, -88, -73, 52, -75, -23, -37, 21]

Ex Output:
[-11.5, -36.0, -80.5, -10.5, -11.5, -49.0, -30.0, -8.0]


Ex Input:
[6, 44, -61, -38, -97, -71, -15, 82, -43, -5, -75, 15, 58]

Ex Output:
[25.0, -8.5, -49.5, -67.5, -84.0, -43.0, 33.5, 19.5, -24.0, -40.0, -30.0, 36.5]


Ex Input:
[-87, 79, -20, 30, 79, -26, -13, -99]

Ex Output:

[-4.0, 29.5, 5.0, 54.5, 26.5, -19.5, -56.0]