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, 73]
[77.0]

[-72, -25, -60, -27, 99, -14, -13, -78, 43, -48, -98]
[-48.5, -42.5, -43.5, 36.0, 42.5, -13.5, -45.5, -17.5, -2.5, -73.0]

[-85, 81, 31, 19, 38, -23, -31, -52, -6]

[-2.0, 56.0, 25.0, 28.5, 7.5, -27.0, -41.5, -29.0]