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].
Example: [-4, 7, 3]
Example solution: [1.5, 5]
Example 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.

Problem: [-18, -29, 1, -39, 91, 28, -66, 48, -72, 36, 52, -89, -92, 92, 54]

Solution: [-23.5, -14.0, -19.0, 26.0, 59.5, -19.0, -9.0, -12.0, -18.0, 44.0, -18.5, -90.5, 0.0, 73.0]