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: [9, 62, 4, -63, -50, 9, -19, -42, -20]

SOLUTION: [35.5, 33.0, -29.5, -56.5, -20.5, -5.0, -30.5, -31.0]

PROBLEM: [49, -66]

SOLUTION: [-8.5]

PROBLEM: [-31, -25, -75, 90, -86, 86, 73, 37]

SOLUTION:
[-28.0, -50.0, 7.5, 2.0, 0.0, 79.5, 55.0]