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: [-16, -7, -2, 3, 84, -53, 9, 30, -67, 44, -42, 99]

SOLUTION: [-11.5, -4.5, 0.5, 43.5, 15.5, -22.0, 19.5, -18.5, -11.5, 1.0, 28.5]

PROBLEM: [66, 78, -55, 77, -81, -61, 2, -92, 59, -99, 16]

SOLUTION: [72.0, 11.5, 11.0, -2.0, -71.0, -29.5, -45.0, -16.5, -20.0, -41.5]

PROBLEM: [86, -24, 64, -49, -55, -34, 91, 69, 56, 53, 92, 29, -36]

SOLUTION:
[31.0, 20.0, 7.5, -52.0, -44.5, 28.5, 80.0, 62.5, 54.5, 72.5, 60.5, -3.5]