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: [-71, -78, -84, 6, 99, 66, -90, -36, -77, -56, 19, -59, 71]

SOLUTION: [-74.5, -81.0, -39.0, 52.5, 82.5, -12.0, -63.0, -56.5, -66.5, -18.5, -20.0, 6.0]

PROBLEM: [-19, 17, -76, 38, 49, -1, 98, -89, -27, 49, 6, 44, 81, 0, 80]

SOLUTION: [-1.0, -29.5, -19.0, 43.5, 24.0, 48.5, 4.5, -58.0, 11.0, 27.5, 25.0, 62.5, 40.5, 40.0]

PROBLEM: [78, -86, -3, 81]

SOLUTION:
[-4.0, -44.5, 39.0]

