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:
[37, -48, 49]

Ex Output:
[-5.5, 0.5]


Ex Input:
[30, -51, 47]

Ex Output:
[-10.5, -2.0]


Ex Input:
[-91, 94, -68, -45, 83]

Ex Output:

[1.5, 13.0, -56.5, 19.0]