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].

[-48, -86, 13, 21, 39, -52, 70, 6, 66, 58, -3, 88, -64]
[-67.0, -36.5, 17.0, 30.0, -6.5, 9.0, 38.0, 36.0, 62.0, 27.5, 42.5, 12.0]

[30, -51, 47]
[-10.5, -2.0]

[-11, -76]

[-43.5]