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:
[-21, 10, 33, 79, -27, 13, -24, 64, -2, 23]

Ex Output:
[-5.5, 21.5, 56.0, 26.0, -7.0, -5.5, 20.0, 31.0, 10.5]


Ex Input:
[72, -90, -99, -88, -87, -26, -40, -45, 69, 32, 57, 21, -67]

Ex Output:
[-9.0, -94.5, -93.5, -87.5, -56.5, -33.0, -42.5, 12.0, 50.5, 44.5, 39.0, -23.0]


Ex Input:
[-57, -47, 35, -53, 91, -23, -87, 34, 32, -5, 99]

Ex Output:

[-52.0, -6.0, -9.0, 19.0, 34.0, -55.0, -26.5, 33.0, 13.5, 47.0]