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].

[-15, 5]
[-5.0]

[6, 12, 68, 37, 39, 100, -48]
[9.0, 40.0, 52.5, 38.0, 69.5, 26.0]

[23, -77, 36, -60, 47, -6, -69, 59, 28, 3, -85, -98, 83, 51]

[-27.0, -20.5, -12.0, -6.5, 20.5, -37.5, -5.0, 43.5, 15.5, -41.0, -91.5, -7.5, 67.0]