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].

[-51, 56, 68, -97, -35, -44, 61, -99, 24, 68, 75, 26, -17, -19]
[2.5, 62.0, -14.5, -66.0, -39.5, 8.5, -19.0, -37.5, 46.0, 71.5, 50.5, 4.5, -18.0]