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].

[31, -43]
[-6.0]

[-12, -89]
[-50.5]

[27, -96, -71, 10, 56, -44, 9, 65, -83]

[-34.5, -83.5, -30.5, 33.0, 6.0, -17.5, 37.0, -9.0]