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:
[-50, -74, 52, -21, 29, -11]

Ex Output:
[-62.0, -11.0, 15.5, 4.0, 9.0]


Ex Input:
[-55, -71, -30, -22]

Ex Output:
[-63.0, -50.5, -26.0]


Ex Input:
[100, 68, 72, 90]

Ex Output:

[84.0, 70.0, 81.0]