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

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

PROBLEM: [-63, 4, 4, 49, -83, 99, 85, -18, 11, 83, 73]

SOLUTION: [-29.5, 4.0, 26.5, -17.0, 8.0, 92.0, 33.5, -3.5, 47.0, 78.0]

PROBLEM: [-81, -32, -61, -26, -88, -29, 41, 28, -90]

SOLUTION:
[-56.5, -46.5, -43.5, -57.0, -58.5, 6.0, 34.5, -31.0]