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].

[75, 87, -2, 42, -20, -50, 51]
[81.0, 42.5, 20.0, 11.0, -35.0, 0.5]

[60, 91, 22, -94, -97, -3, -34, -62, -88, -42, 22, -93, -33, -19]
[75.5, 56.5, -36.0, -95.5, -50.0, -18.5, -48.0, -75.0, -65.0, -10.0, -35.5, -63.0, -26.0]

[67, -6, -17, 59]

[30.5, -11.5, 21.0]