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: [10, 69, 6, -80, -39, 74]

SOLUTION: [39.5, 37.5, -37.0, -59.5, 17.5]

PROBLEM: [73, -32, -75, 39, -10, -15, 90, -89, -56, 40, -66, -89, -34]

SOLUTION: [20.5, -53.5, -18.0, 14.5, -12.5, 37.5, 0.5, -72.5, -8.0, -13.0, -77.5, -61.5]

PROBLEM: [60, -41, 4, -43, 12, 87, 54, 88, -25, 54, -57, 0, 45, -65]

SOLUTION:
[9.5, -18.5, -19.5, -15.5, 49.5, 70.5, 71.0, 31.5, 14.5, -1.5, -28.5, 22.5, -10.0]