A(n) ______ begins at a vertex v, passes through every vertex exactly once, and terminates at v.

If a computer is not shut down properly, the ________ program will usually run automatically the next time the computer is started

Fill in the blank(s) with correct word

You should use a postorder iteration method for the tree's __iter__ method to enable the user to create a clone of the tree with the same shape as the original.

Answer the following statement true (T) or false (F)