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].

[72, -90, -99, -88, -87, -26, -40, -45, 69, 32, 57, 21, -67]
[-9.0, -94.5, -93.5, -87.5, -56.5, -33.0, -42.5, 12.0, 50.5, 44.5, 39.0, -23.0]

[-77, 76, 21, 100, 19]
[-0.5, 48.5, 60.5, 59.5]

[-68, -43, 94, 31, 60, -14, -3, -75, 3, -1, 54, -100]

[-55.5, 25.5, 62.5, 45.5, 23.0, -8.5, -39.0, -36.0, 1.0, 26.5, -23.0]