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].
One example: [-4, 7, 3]
Solution is here: [1.5, 5]
Explanation: To create the answer, we should first calculate the average of -4 and 7, that is: (-4 + 7 ) / 2 = 1.5, so the first element of the answer is 1.5. Then, we need to calculate the average of 7 and 3, that is: 5. So the second element of the answer is 5.

Now, solve this: [11, 73, 72, -73, -52, -81, -50, -4, 71, -33, -19, -60, 4]
Solution:
[42.0, 72.5, -0.5, -62.5, -66.5, -65.5, -27.0, 33.5, 19.0, -26.0, -39.5, -28.0]