Seven boxes, A, B, C, D, E, F and G, are kept one over the other but not necessarily in the same order. Only two boxes are kept between C and E. Only A is kept above B. No box is kept below E. F is kept at some place below D but at some place above G. How many boxes are kept between A and G?

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?