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].
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Question: [-14, 33, -89]

Answer: [9.5, -28.0]


Question: [31, -43]

Answer: [-6.0]


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

Answer:
[-4.0, -44.5, 39.0]