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, -25, -51, 46, -78, 9, -14, -14, -25, 79, 56, -5]
[-38.0, -38.0, -2.5, -16.0, -34.5, -2.5, -14.0, -19.5, 27.0, 67.5, 25.5]

[-77, -52, 64, 34, -9, 29, -91, 90, 8, -87, 34, 1, -8]
[-64.5, 6.0, 49.0, 12.5, 10.0, -31.0, -0.5, 49.0, -39.5, -26.5, 17.5, -3.5]

[40, 34, -39]

[37.0, -2.5]