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: [-25, 38, 7, 52, -63, -81, -63, -74, 85, 27, 2]

SOLUTION: [6.5, 22.5, 29.5, -5.5, -72.0, -72.0, -68.5, 5.5, 56.0, 14.5]

PROBLEM: [98, -10, -28, -21, -15, 11, -22, -51, 54, 91, 46, -62]

SOLUTION:
[44.0, -19.0, -24.5, -18.0, -2.0, -5.5, -36.5, 1.5, 72.5, 68.5, -8.0]