A verb is an essential part of a sentence structure that is referred also as the action word. In this case, the action word present here is had. The nouns in this sentence are players, guards and injury rate. The subject are the guards since they are the center of the sentence. Answer is had.
Fifty cents is a plural noun since it is talking about more than one cent. In the example, you would say, "fifty cents <em>is </em>how much I owe you".
The film has raunsford explain the trap with his companian