When method printf requires multiple arguments, the arguments are separated with ________.

To deal with the threat of smoke, the responsible manager should install _______ in every room that contains computer equipment as well as under raised floors and over suspended ceilings.

Fill in the blank(s) with the appropriate word(s).

The ________ tool changes the color of lines and borders of an object.

(a) paint bucket (b) ink bottle (c) line (d) brush