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: [67, 45, 59, -50, -28, -70, -84, 69, 72, 53]

SOLUTION: [56.0, 52.0, 4.5, -39.0, -49.0, -77.0, -7.5, 70.5, 62.5]

PROBLEM: [40, 77, 36, 50, 36, 89, -13, 75, -57, -13, 15, 42, 72, 21]

SOLUTION: [58.5, 56.5, 43.0, 43.0, 62.5, 38.0, 31.0, 9.0, -35.0, 1.0, 28.5, 57.0, 46.5]

PROBLEM: [6, 72, 58]

SOLUTION:
[39.0, 65.0]