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].

[73, -32, -75, 39, -10, -15, 90, -89, -56, 40, -66, -89, -34]
[20.5, -53.5, -18.0, 14.5, -12.5, 37.5, 0.5, -72.5, -8.0, -13.0, -77.5, -61.5]

[-47, -92, 82, -29, -21, -46, -47, 55, -27, -9, 39, -94, 81]
[-69.5, -5.0, 26.5, -25.0, -33.5, -46.5, 4.0, 14.0, -18.0, 15.0, -27.5, -6.5]

[-17, -43, 21, -21, -32]

[-30.0, -11.0, 0.0, -26.5]