6
Create a vector b with the following elements:
b = (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
Do not type out all elements explicitly.
Bonus points if use only one line of command.
Hint: create b by concatenating 2 shorter vectors.