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: [-49, -91, -7]

SOLUTION: [-70.0, -49.0]

PROBLEM: [-19, 70, -70, -72, 67, 39, -45, -57, -75]

SOLUTION: [25.5, 0.0, -71.0, -2.5, 53.0, -3.0, -51.0, -66.0]

PROBLEM: [80, 69, 49, -70, 12, 78]

SOLUTION:
[74.5, 59.0, -10.5, -29.0, 45.0]