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: [-32, 19, 54, -51]

SOLUTION: [-6.5, 36.5, 1.5]

PROBLEM: [7, -25, 16, 74, -18]

SOLUTION: [-9.0, -4.5, 45.0, 28.0]

PROBLEM: [11, -1, 98, -91, 26, 85, -19, 9, -51]

SOLUTION:
[5.0, 48.5, 3.5, -32.5, 55.5, 33.0, -5.0, -21.0]