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: [-39, 16, -88, -73, 52, -75, -23, -37, 21]

SOLUTION: [-11.5, -36.0, -80.5, -10.5, -11.5, -49.0, -30.0, -8.0]

PROBLEM: [-15, -37, -91, -88, -52, -30, 63, 69, -36, 41, 39, -49, 7, -57, -37]

SOLUTION: [-26.0, -64.0, -89.5, -70.0, -41.0, 16.5, 66.0, 16.5, 2.5, 40.0, -5.0, -21.0, -25.0, -47.0]

PROBLEM: [75, -91, -98, 92, 89, 28, 94, 27, -2, 45, 54]

SOLUTION:
[-8.0, -94.5, -3.0, 90.5, 58.5, 61.0, 60.5, 12.5, 21.5, 49.5]