Passage 6

　　Two male singers, P and S; two female singers, R and V; two male comedians, T and W; and two female comedians, Q and U, are the eight entertainers who are to perform at the Stuart heater on a certain night. Each entertainer is to perform alone and only once that night. The entertainers may perform in any order that conforms to the following restrictions:

　　The performances by singers and the performances by comedians must alternate throughout the evening.

　　The first performance that evening must be by a female entertainer, and the second performance by a male entertainer.

　　The final performance must be by a male singer.

　　1. Which of the following could be the last of the entertainers to perform?

　　 R S T V W

　　2. Which of the following could be the first of the entertainers to perform?

　　 P R U V W

　　3. If R is to perform fourth, which of the following must perform sixth?

　　 P S U V W

　　4. If U is to perform seventh, which of the following must perform first?

　　 Q R S T V

　　5. If P is to perform eighth, which of the following must perform second?

　　 R S T V W

　　6. If T is to perform third, W must perform

　　 first or fifth second or fifth

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