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: [42, -57, 62, 14, -89, 19, 56, -90, 32, 21, -2, -9]

SOLUTION: [-7.5, 2.5, 38.0, -37.5, -35.0, 37.5, -17.0, -29.0, 26.5, 9.5, -5.5]

PROBLEM: [58, 76, 12, -55, 74, 15, -81]

SOLUTION: [67.0, 44.0, -21.5, 9.5, 44.5, -33.0]

PROBLEM: [-100, -52, 29, -57, 17, -1, -1, -32, 4]

SOLUTION:
[-76.0, -11.5, -14.0, -20.0, 8.0, -1.0, -16.5, -14.0]