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].
--------
Question: [-2, -57, 85, -7, 81, 57, -60, -87, -18]

Answer: [-29.5, 14.0, 39.0, 37.0, 69.0, -1.5, -73.5, -52.5]


Question: [-19, 3, -82, 68, -38, 19, -48, -86]

Answer: [-8.0, -39.5, -7.0, 15.0, -9.5, -14.5, -67.0]


Question: [-70, 69]

Answer:
[-0.5]