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: [-3, -21, 57, -70, -97, -90, 31, 83, 68, -34, -65, 13]

SOLUTION: [-12.0, 18.0, -6.5, -83.5, -93.5, -29.5, 57.0, 75.5, 17.0, -49.5, -26.0]

PROBLEM: [94, -26, 89, -1, -81, -27, 5, -28, 65, 20, 81, -50]

SOLUTION:
[34.0, 31.5, 44.0, -41.0, -54.0, -11.0, -11.5, 18.5, 42.5, 50.5, 15.5]