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: [20, -17, 41, -60, 2, 64, 36, 16, -43]

SOLUTION: [1.5, 12.0, -9.5, -29.0, 33.0, 50.0, 26.0, -13.5]

PROBLEM: [-85, 71, 61, 74, -76, -61, 49, -68, -71, -45, -36, -3, 85, -60]

SOLUTION: [-7.0, 66.0, 67.5, -1.0, -68.5, -6.0, -9.5, -69.5, -58.0, -40.5, -19.5, 41.0, 12.5]

PROBLEM: [18, -17]

SOLUTION:
[0.5]