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: [-2, -57, 85, -7, 81, 57, -60, -87, -18]

SOLUTION: [-29.5, 14.0, 39.0, 37.0, 69.0, -1.5, -73.5, -52.5]

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

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

PROBLEM: [45, 41, 42, 68, -34, -80, -60, -50, 28, 58, -98, -2, -67]

SOLUTION:
[43.0, 41.5, 55.0, 17.0, -57.0, -70.0, -55.0, -11.0, 43.0, -20.0, -50.0, -34.5]