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: [93, 23, -18, 1, -66]

SOLUTION: [58.0, 2.5, -8.5, -32.5]

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: [72, 20, -21]

SOLUTION:
[46.0, -0.5]