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: [58, -15]

Answer: [21.5]


Question: [83, 68, 64, 59]

Answer: [75.5, 66.0, 61.5]


Question: [-30, -11]

Answer:
[-20.5]