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:
[-29, 30, -85, 70, 5, -41]

Ex Output:
[0.5, -27.5, -7.5, 37.5, -18.0]


Ex Input:
[54, 27, 20, -9]

Ex Output:
[40.5, 23.5, 5.5]


Ex Input:
[-57, -37, -11, -10, -77, 56, -4, -97, -52, -87, 92, -86, 83, -46, 72]

Ex Output:

[-47.0, -24.0, -10.5, -43.5, -10.5, 26.0, -50.5, -74.5, -69.5, 2.5, 3.0, -1.5, 18.5, 13.0]