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: [-71, 91, 51, -78, -87, -87, 71]

SOLUTION: [10.0, 71.0, -13.5, -82.5, -87.0, -8.0]

PROBLEM: [-89, 26, -64, -96, 40, -90, -88]

SOLUTION: [-31.5, -19.0, -80.0, -28.0, -25.0, -89.0]

PROBLEM: [90, -47, -70, 84]

SOLUTION:
[21.5, -58.5, 7.0]