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: [-100, 41, -68, -31, -71, -40, 77]

SOLUTION: [-29.5, -13.5, -49.5, -51.0, -55.5, 18.5]

PROBLEM: [87, 22, 13, 9, -28, -51, -58, -11, 40, 60, 25]

SOLUTION: [54.5, 17.5, 11.0, -9.5, -39.5, -54.5, -34.5, 14.5, 50.0, 42.5]

PROBLEM: [-68, 59]

SOLUTION:
[-4.5]