Instructions: 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].
Input: [-30, 45, 90, 15, 77, -92, 59, 84, -55, -28, 10, -18, -17]
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
[7.5, 67.5, 52.5, 46.0, -7.5, -16.5, 71.5, 14.5, -41.5, -9.0, -4.0, -17.5]