Problems for which no known polynomial solution algorithm exists are sometimes approached via ____ algorithms.

Clip art images can be manipulated using the tools that are available on the PICTURE TOOLS ________ tab

A) DESIGN B) FORMAT C) DETAILS D) ARRANGE

The _____ function returns a node-set that matches a specified value from a key index.

A. ?index() B. ?key() C. ?return() D. ?id()