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: [91, 3, -59, 63]

SOLUTION: [47.0, -28.0, 2.0]

PROBLEM: [84, -86, 12, 56, 39, 30]

SOLUTION: [-1.0, -37.0, 34.0, 47.5, 34.5]

PROBLEM: [-12, 12, 10, 8, -20, -39, -80, -85, -24, 46]

SOLUTION:
[0.0, 11.0, 9.0, -6.0, -29.5, -59.5, -82.5, -54.5, 11.0]