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: [7, -25, 16, 74, -18]

SOLUTION: [-9.0, -4.5, 45.0, 28.0]

PROBLEM: [40, -65, -77]

SOLUTION: [-12.5, -71.0]

PROBLEM: [21, 96, 28, -62, 55, 54, -8, 70, -90, 13, 82, 31]

SOLUTION:
[58.5, 62.0, -17.0, -3.5, 54.5, 23.0, 31.0, -10.0, -38.5, 47.5, 56.5]