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].
[-45, -91, 14, 10, -5, -39, 31, 51, 90, 58, -8, 15, 20, 99, -36]