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].

[-81, 99, -79, 70, 91]
[9.0, 10.0, -4.5, 80.5]

[-47, 58, 28]
[5.5, 43.0]

[-61, -23, 67]

[-42.0, 22.0]