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: [77, 66, 11]

SOLUTION: [71.5, 38.5]

PROBLEM: [-69, -76, -98, -72, 6, -95, -34, 44, -90, 96]

SOLUTION: [-72.5, -87.0, -85.0, -33.0, -44.5, -64.5, 5.0, -23.0, 3.0]

PROBLEM: [-13, 65, 31, -23, -11]

SOLUTION:
[26.0, 48.0, 4.0, -17.0]