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

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

PROBLEM: [-97, -65, -55, 15]

SOLUTION: [-81.0, -60.0, -20.0]

PROBLEM: [84, 90, 50, 43, 74, 74, 62]

SOLUTION:
[87.0, 70.0, 46.5, 58.5, 74.0, 68.0]