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:
[87, 34, 59, -97, -67, -71, -28, -51, 56]

Ex Output:
[60.5, 46.5, -19.0, -82.0, -69.0, -49.5, -39.5, 2.5]


Ex Input:
[-50, 66, -98, -47, -11]

Ex Output:
[8.0, -16.0, -72.5, -29.0]


Ex Input:
[11, -49, 13, -19, -20, 32, 66]

Ex Output:

[-19.0, -18.0, -3.0, -19.5, 6.0, 49.0]