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].

[18, -10, 28, 29, -23, 98]
[4.0, 9.0, 28.5, 3.0, 37.5]

[-57, -27, -20, 4, -82, 58, -39, 92, 64, -68, -21]
[-42.0, -23.5, -8.0, -39.0, -12.0, 9.5, 26.5, 78.0, -2.0, -44.5]

[25, -4, -51, 83]

[10.5, -27.5, 16.0]