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]

[-74, -74, 64, -88, 59, 99, 27, -18, -49]
[-74.0, -5.0, -12.0, -14.5, 79.0, 63.0, 4.5, -33.5]

[54, 51, -18]

[52.5, 16.5]