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:
[42, 42, 0, -99, -11, 17, -42, -72]

Ex Output:
[42.0, 21.0, -49.5, -55.0, 3.0, -12.5, -57.0]


Ex Input:
[-99, 100, -53, -61, 64, -96, 13]

Ex Output:
[0.5, 23.5, -57.0, 1.5, -16.0, -41.5]


Ex Input:
[-61, -96]

Ex Output:

[-78.5]