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: [-100, -17, -69, 0, 35, -39, -34, -70, 21, 55, -74, -63]

SOLUTION: [-58.5, -43.0, -34.5, 17.5, -2.0, -36.5, -52.0, -24.5, 38.0, -9.5, -68.5]

PROBLEM: [20, 17, 12, -4, 33, -71, 17, -43, 72, -53, 80]

SOLUTION: [18.5, 14.5, 4.0, 14.5, -19.0, -27.0, -13.0, 14.5, 9.5, 13.5]

PROBLEM: [1, -70, -4, 62, 17, -11, -20, -44, 30, 44, 83, 42, -73, 3, 44]

SOLUTION:
[-34.5, -37.0, 29.0, 39.5, 3.0, -15.5, -32.0, -7.0, 37.0, 63.5, 62.5, -15.5, -35.0, 23.5]