Directions: Match the following commands to the corresponding descriptions. Place the letter that indicates your answer on the line in front of each command. (1 point each) a. deletes all the files in the current directory b. lists only the invisible files c. copies wc to yyy and asks for confirmation if yyy exists d. displays contents of a file called xxx . displays all the filenames that end with the letter a, b, c, or d f. copies wc to yyy g. displays all the filenames that begin with a or A h. copies contents of wc to an existing file xxx i. counts the words and characters in wc and saves them in XXX j. renames the file named xxx to yyy 19. cp w 20. cat wc >> XXX 21. cat XXX 22. WC-cw wc >> XXX 23. -i w 24. Is *[a-d] 25. rm * 26. ls. * 27. Is [Aa]* 28. mv xxx yyy