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: [91, -52, -63, 41]

SOLUTION: [19.5, -57.5, -11.0]

PROBLEM: [-1, 75, -1, -37, -38, -10, 70, -75, -98, 39, 37, -15, 60]

SOLUTION: [37.0, 37.0, -19.0, -37.5, -24.0, 30.0, -2.5, -86.5, -29.5, 38.0, 11.0, 22.5]

PROBLEM: [18, -60, -63, -63, -55, 60, -1, -54, -79, -46, 47, 89, 87]

SOLUTION:
[-21.0, -61.5, -63.0, -59.0, 2.5, 29.5, -27.5, -66.5, -62.5, 0.5, 68.0, 88.0]