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: [-63, 22, 66, -25, 21, -32, -57, -66, 50, -82, 29]

SOLUTION: [-20.5, 44.0, 20.5, -2.0, -5.5, -44.5, -61.5, -8.0, -16.0, -26.5]

PROBLEM: [-2, 12, 55, -100, 82, 53, 13, 62, -93, -8, -25, -15, 92]

SOLUTION: [5.0, 33.5, -22.5, -9.0, 67.5, 33.0, 37.5, -15.5, -50.5, -16.5, -20.0, 38.5]

PROBLEM: [-91, -64]

SOLUTION:
[-77.5]