A, B, C, D, E and F live on six different floors of the same building. The lowermost floor is numbered 1, the floor above it is 2, and so on till the topmost floor is 6. E lives on an odd-numbered floor but not floor 3. The sum of the floors on which E and D live is 7. F lives immediately below B. C lives on the top floor. How many people live above F?

Each of H, U, S, B, A, N, and D has an exam on a different day of a week starting from Monday and ending on Sunday of the same week. H has an exam on Friday. Only two people have exams between N and H. Only four people have exams between S and N. A has an exam immediately after D. B does not have an exam on Monday. How many people have exam(s) between B and U?

Each of H, U, S, B, A, N, and D has an exam on a different day of the week starting from Monday and ending on Sunday of the same week. D has an exam on Thursday. B has an exam two days before D. Only four people have exams between S and B. A has an exam on one of the days after B. U has an exam on the day immediately before H. S has an exam after B. How many people have exams between H and A?