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].

[-51, 1, -77, -80, 33, -42, 41, 86, -18, 58]
[-25.0, -38.0, -78.5, -23.5, -4.5, -0.5, 63.5, 34.0, 20.0]

[55, -46, 64, -40]
[4.5, 9.0, 12.0]

[-66, 53, 2, -65, 1, 92, -98, -55, 21, 2, 60, 91]

[-6.5, 27.5, -31.5, -32.0, 46.5, -3.0, -76.5, -17.0, 11.5, 31.0, 75.5]