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: [-89, -9, -14, -28, 41, 44, 86, 40, 75, 30, -1, 86]

SOLUTION: [-49.0, -11.5, -21.0, 6.5, 42.5, 65.0, 63.0, 57.5, 52.5, 14.5, 42.5]

PROBLEM: [54, 4, -10, 62, -65, 22, -21, 29, -27, -9, -32]

SOLUTION: [29.0, -3.0, 26.0, -1.5, -21.5, 0.5, 4.0, 1.0, -18.0, -20.5]

PROBLEM: [33, -84, -50]

SOLUTION:
[-25.5, -67.0]