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: [55, -46, 64, -40]

SOLUTION: [4.5, 9.0, 12.0]

PROBLEM: [-21, 13, 42, 12, 48, 35, -98, -25, -7, 21, 35, -24, -45]

SOLUTION: [-4.0, 27.5, 27.0, 30.0, 41.5, -31.5, -61.5, -16.0, 7.0, 28.0, 5.5, -34.5]

PROBLEM: [77, 51, -15, 10]

SOLUTION:
[64.0, 18.0, -2.5]