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].

[-97, -65, -55, 15]
[-81.0, -60.0, -20.0]

[52, -7, -11, 69]
[22.5, -9.0, 29.0]

[-69, 60]

[-4.5]