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:
[57, 81, -99]

Ex Output:
[69.0, -9.0]


Ex Input:
[7, -10, -55, 26, -43, 13, 16, -100, 57, 71, 98, -89, 35]

Ex Output:
[-1.5, -32.5, -14.5, -8.5, -15.0, 14.5, -42.0, -21.5, 64.0, 84.5, 4.5, -27.0]


Ex Input:
[-74, -62, -78, -14, -82, -33, -1, -73, 69]

Ex Output:

[-68.0, -70.0, -46.0, -48.0, -57.5, -17.0, -37.0, -2.0]