Two marbles are drawn randomly one after the other without replacement from a jar that contains \(7\) red marbles, \(8\) white marbles, and \(9\) yellow marbles. Find the probability of the following events.

(a) A red marbles is drawn first followed by a white marble.

(b) A white marble is drawn first followed by a white marble.

(c) A yellow marble is not drawn at all.