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, 83, 0, -53]

SOLUTION: [-3.0, 41.5, -26.5]

PROBLEM: [-10, -49, -49, 14, 92, 63, -10, 73]

SOLUTION: [-29.5, -49.0, -17.5, 53.0, 77.5, 26.5, 31.5]

PROBLEM: [97, 21, -20, -60, -90]

SOLUTION:
[59.0, 0.5, -40.0, -75.0]