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: [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: [-72, 72, -34, 49, -10, 60, -21, -14]

SOLUTION: [0.0, 19.0, 7.5, 19.5, 25.0, 19.5, -17.5]

PROBLEM: [81, -30, -72, 2, 93, 28, 81, 21, -34, -53]

SOLUTION:
[25.5, -51.0, -35.0, 47.5, 60.5, 54.5, 51.0, -6.5, -43.5]