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: [99, -28, -18, -89, -14, -80, -54, -84, -82]

SOLUTION: [35.5, -23.0, -53.5, -51.5, -47.0, -67.0, -69.0, -83.0]

PROBLEM: [65, -89, -12, -85, -58, 83]

SOLUTION: [-12.0, -50.5, -48.5, -71.5, 12.5]

PROBLEM: [-61, -5, -3, -4]

SOLUTION:
[-33.0, -4.0, -3.5]