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:
[-56, 30, -70]

Ex Output:
[-13.0, -20.0]


Ex Input:
[-59, 35, 54, 98, 61, -21, 64, 91, -17, -70]

Ex Output:
[-12.0, 44.5, 76.0, 79.5, 20.0, 21.5, 77.5, 37.0, -43.5]


Ex Input:
[69, -33, 46, 83]

Ex Output:

[18.0, 6.5, 64.5]