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: [20, 75, 10, 74, -35, 64, -2]

SOLUTION: [47.5, 42.5, 42.0, 19.5, 14.5, 31.0]

PROBLEM: [59, 57]

SOLUTION: [58.0]

PROBLEM: [-39, -70, -70, 14, -23, 55, 99, -82, -98, -69, -35, 31]

SOLUTION:
[-54.5, -70.0, -28.0, -4.5, 16.0, 77.0, 8.5, -90.0, -83.5, -52.0, -2.0]