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:
[40, 34, -39]

Ex Output:
[37.0, -2.5]


Ex Input:
[57, -42, 24, 40, 59, 88, -75, -11, 9, -56, -92, -80]

Ex Output:
[7.5, -9.0, 32.0, 49.5, 73.5, 6.5, -43.0, -1.0, -23.5, -74.0, -86.0]


Ex Input:
[-6, 89, -91, 16, -36, -58, -45, -91, 47, -29, -35, 17, 72]

Ex Output:

[41.5, -1.0, -37.5, -10.0, -47.0, -51.5, -68.0, -22.0, 9.0, -32.0, -9.0, 44.5]