Two male singers, Paul and Sam; two female singers, Rita and Mita; two male comedians, Topu and Wahed; and two female comedians, Kate and Lira, are the eight entertainers who are to perform at the National Theater 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 performance by singers and the performance 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. Q-4: If Paul is to perform eighth, which of the following person musts must perform second?