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].
Q: [-7, -28, 73, 15, -30, 2, 42, -51, 12, 91, 35, -93]
A: 
[-17.5, 22.5, 44.0, -7.5, -14.0, 22.0, -4.5, -19.5, 51.5, 63.0, -29.0]