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, -97, 24, 13, -42, -46, -6, 31]
[-89.0, -36.5, 18.5, -14.5, -44.0, -26.0, 12.5]

[-45, -84, 35, 40]
[-64.5, -24.5, 37.5]

[-86, -99, 68, -95, 5, -77, -78, 22, -78, -85, 51, -26]

[-92.5, -15.5, -13.5, -45.0, -36.0, -77.5, -28.0, -28.0, -81.5, -17.0, 12.5]