Detailed 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].
See one example below:
Problem: [-4, 7, 3]
Solution: [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.

Problem: [91, 97, -31, -77, 49, -81, 51, 66]
Solution:
[94.0, 33.0, -54.0, -14.0, -16.0, -15.0, 58.5]