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: [75, 87, -2, 42, -20, -50, 51]

SOLUTION: [81.0, 42.5, 20.0, 11.0, -35.0, 0.5]

PROBLEM: [-36, 17, -25, -21, 45, 34, -39, 21, 71]

SOLUTION: [-9.5, -4.0, -23.0, 12.0, 39.5, -2.5, -9.0, 46.0]

PROBLEM: [68, -20, -100]

SOLUTION:
[24.0, -60.0]