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].

[-18, -74, -7, 59, -76, -57, -99, 65]
[-46.0, -40.5, 26.0, -8.5, -66.5, -78.0, -17.0]

[83, 67, 5, -15]
[75.0, 36.0, -5.0]

[-21, 27, -6]

[3.0, 10.5]