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: [70, 22, 42, -61, -38, 33, -70]

SOLUTION: [46.0, 32.0, -9.5, -49.5, -2.5, -18.5]

PROBLEM: [83, 67, 5, -15]

SOLUTION: [75.0, 36.0, -5.0]

PROBLEM: [-70, -91]

SOLUTION:
[-80.5]