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: [18, -10, 28, 29, -23, 98]

SOLUTION: [4.0, 9.0, 28.5, 3.0, 37.5]

PROBLEM: [-49, -91, -7]

SOLUTION: [-70.0, -49.0]

PROBLEM: [53, -93, 11, 64, -86]

SOLUTION:
[-20.0, -41.0, 37.5, -11.0]