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: [97, -97, 10]

SOLUTION: [0.0, -43.5]

PROBLEM: [89, -29, -43, 99, -63, -80, -73, -50, -58]

SOLUTION: [30.0, -36.0, 28.0, 18.0, -71.5, -76.5, -61.5, -54.0]

PROBLEM: [-84, 100, -68, 43]

SOLUTION:
[8.0, 16.0, -12.5]