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6. In how many ways he 5 couples be seated In a round table if each couple consists of a man and a woman and that the men and women are to sit together? 7. A group of 5 volunteer marshals will be assigned to maintain order during a basketball game. If there are 10 volunteer marshals, in how many ways can the group be formed? 8. There are 5 points on a plane, no three of which are collinear. How many different lines can be formed? 9. A committee of senior and junior executives will be formed to decide on recruitment issues. If there 5 senior and 10 junior executives in the company, in how many ways can a 5-member committee be formed if: a. there should be at least 1 or at most 2 senior executives? b. there are at least 3 junior executives? 10. In how many ways can the letters of the word SESSIONS be arranged in a circular logo