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: [18, -10, 28, 29, -23, 98]

SOLUTION: [4.0, 9.0, 28.5, 3.0, 37.5]

PROBLEM: [0, -45, 44, -4, -58, -52, -72, -46, 35, -83, -25]

SOLUTION:
[-22.5, -0.5, 20.0, -31.0, -55.0, -62.0, -59.0, -5.5, -24.0, -54.0]