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: [-20, 65, 24, -49, 2, -21, 86, 4, 30, 67, -98]

SOLUTION: [22.5, 44.5, -12.5, -23.5, -9.5, 32.5, 45.0, 17.0, 48.5, -15.5]

PROBLEM: [59, -19, -85]

SOLUTION: [20.0, -52.0]

PROBLEM: [-86, -83]

SOLUTION:
[-84.5]