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:
[73, -32, -75, 39, -10, -15, 90, -89, -56, 40, -66, -89, -34]

Ex Output:
[20.5, -53.5, -18.0, 14.5, -12.5, 37.5, 0.5, -72.5, -8.0, -13.0, -77.5, -61.5]


Ex Input:
[-21, 12, 53, 49, 2, -54, -28, 8, -77, 27, -33]

Ex Output:
[-4.5, 32.5, 51.0, 25.5, -26.0, -41.0, -10.0, -34.5, -25.0, -3.0]


Ex Input:
[1, -85]

Ex Output:

[-42.0]