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, -27, -20, 4, -82, 58, -39, 92, 64, -68, -21]

Ex Output:
[-42.0, -23.5, -8.0, -39.0, -12.0, 9.5, 26.5, 78.0, -2.0, -44.5]


Ex Input:
[92, -79, 17, 91, 49, 10, -50, -35]

Ex Output:
[6.5, -31.0, 54.0, 70.0, 29.5, -20.0, -42.5]


Ex Input:
[20, -54, 55, -46, -96, 61, 91]

Ex Output:

[-17.0, 0.5, 4.5, -71.0, -17.5, 76.0]