You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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].

[-4, 7, 3]
Solution: [1.5, 5]
Why? 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.

New input: [31, -83, -40, -44, -72, 68, 43, -6, -88, 61, -41, 50, -25]
Solution:
[-26.0, -61.5, -42.0, -58.0, -2.0, 55.5, 18.5, -47.0, -13.5, 10.0, 4.5, 12.5]