In the accompanying figure of Windows 10, Box A represents a(n) _____.

Implement methods append, count, index, insert, pop, remove, reverse and sort for class SingleList. Review the description of list methods in Section 5.6—the corre- sponding SingleList methods should specify the same arguments and should return the same val- ue. Any new method that modifies the list should ensure that only unique values are inserted. The method should raise an exception if

the client attempts to insert an existing value. Also, implement methods __delitem__ and __contains__ to enable clients to delete list elements with key- word del or perform membership tests with keyword in. What will be an ideal response?

When displaying a large text file, what two commands provide the ability to show text in a page by page fashion??

A. more B. paged? C. less D. ?buffer