TASK DEFINITION: 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].
PROBLEM: [18, -97, -66, -82, -74, 44, 15, 1, 79, -3]

SOLUTION: [-39.5, -81.5, -74.0, -78.0, -15.0, 29.5, 8.0, 40.0, 38.0]

PROBLEM: [74, -67, 28, 48, 8, -40, 60, 25, 55, -34, 96, -36]

SOLUTION: [3.5, -19.5, 38.0, 28.0, -16.0, 10.0, 42.5, 40.0, 10.5, 31.0, 30.0]

PROBLEM: [91, 91, -90, -99]

SOLUTION:
[91.0, 0.5, -94.5]