Each of C, D, E, F, G, H and I has an exam on a different day of a week starting from Monday and ending on Sunday of the same week. Only three people have exams between D and F. F has the exam on the last day of the week. Only one person has the exam between H and G. E's exam is immediately the day before I's. C doesn't have the exam on Friday. G has the exam before H. How many people have the exam between C and E?

Seven persons — C, D, E, F, W, X, and Y — have exams on different days of the same week, starting Monday and ending Sunday. F's exam is on Thursday. Only C's exam is scheduled between Y and F. Exactly four persons have exams between D and Y. C's exam is after Y. E's exam is immediately before X's exam. D's exam is after Y. Who among the following has an exam on the first day of the week (Monday)?

Each of D, E, F, G, R, S, and T has an exam on a different day of a week, starting from Monday and ending on Sunday of the same week. Only two people have exams before R. Only one person has an exam after F. Only three people have exams between R and T. Only one person has an exam between G and D. E has an exam immediately before G. Who among the following has an exam on Friday?