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: [7, -21, -30, -4, -56, 19, 24, -47, 92]

SOLUTION: [-7.0, -25.5, -17.0, -30.0, -18.5, 21.5, -11.5, 22.5]

PROBLEM: [-78, -89, -72, 90, -85, -78, -35]

SOLUTION: [-83.5, -80.5, 9.0, 2.5, -81.5, -56.5]

PROBLEM: [14, -69, -77, 88, -38, -100, 28, 26, -53, 33, -24, -2]

SOLUTION:
[-27.5, -73.0, 5.5, 25.0, -69.0, -36.0, 27.0, -13.5, -10.0, 4.5, -13.0]