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: [40, 34, -39]

SOLUTION: [37.0, -2.5]

PROBLEM: [-56, 32, -54]

SOLUTION: [-12.0, -11.0]

PROBLEM: [-85, -84]

SOLUTION:
[-84.5]