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: [-42, -76]

SOLUTION: [-59.0]

PROBLEM: [-47, 11, -88, -4, -97, 50, 86, -64]

SOLUTION: [-18.0, -38.5, -46.0, -50.5, -23.5, 68.0, 11.0]

PROBLEM: [80, -9, -11]

SOLUTION:
[35.5, -10.0]