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: [55, -33, 9, 23, -18, -6, -90, -6, -78]

SOLUTION: [11.0, -12.0, 16.0, 2.5, -12.0, -48.0, -48.0, -42.0]

PROBLEM: [-67, -96, -7, 11]

SOLUTION: [-81.5, -51.5, 2.0]

PROBLEM: [95, -69, 65, -10, -87, 82, -9]

SOLUTION:
[13.0, -2.0, 27.5, -48.5, -2.5, 36.5]