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].
[-22, -69, -65, -89, -17, 30, 51, -17, -81, -91, 70, -48, -53, 21, 0]