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: [-21, 92, -76, 59, 41, -99, -5, 35, 92, 66, -50]

SOLUTION: [35.5, 8.0, -8.5, 50.0, -29.0, -52.0, 15.0, 63.5, 79.0, 8.0]

PROBLEM: [-23, 69, -75]

SOLUTION: [23.0, -3.0]

PROBLEM: [27, -4, 21, -12, -81, -5, -79, 26, -49, -95, -58, -76, 68, 10]

SOLUTION:
[11.5, 8.5, 4.5, -46.5, -43.0, -42.0, -26.5, -11.5, -72.0, -76.5, -67.0, -4.0, 39.0]