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:
[87, 34, 59, -97, -67, -71, -28, -51, 56]

Ex Output:
[60.5, 46.5, -19.0, -82.0, -69.0, -49.5, -39.5, 2.5]


Ex Input:
[25, 11, -70, 49, 17, 25, -51, -78, -13, -69, -55, 83, -8]

Ex Output:
[18.0, -29.5, -10.5, 33.0, 21.0, -13.0, -64.5, -45.5, -41.0, -62.0, 14.0, 37.5]


Ex Input:
[27, -48, 99, 42, -24, 100]

Ex Output:

[-10.5, 25.5, 70.5, 9.0, 38.0]