Seven boys A, B, C, D, E, F, and G own seven different cars C1, C2, C3, C4, C5, C6, and C7 (not necessarily in that order). B and E have C5 and C3 respectively. D does not have C1, C2, C6, or C7. G has either C1 or C4. C does not have C2. A does not have C2 or C6. Which of the following statements is/are correct? I. C has C6. II. A and F have C7 and C2 respectively.

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?