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: [1, 77, 55, -37, -65, 80, 31, -37, -61, 3, -80]

SOLUTION: [39.0, 66.0, 9.0, -51.0, 7.5, 55.5, -3.0, -49.0, -29.0, -38.5]

PROBLEM: [-7, 40, 98, 92, -81, 78, -22, 21]

SOLUTION: [16.5, 69.0, 95.0, 5.5, -1.5, 28.0, -0.5]

PROBLEM: [-81, -43]

SOLUTION:
[-62.0]