1.
(a) Books: minimum 3, maximum 18; Readers: minimum 0, maximum 72
(b) Books: minimum 2, maximum unlimited; Authors: minimum 1, maximum unlimited
2.
3. Overlapping (e.g., Fiction and and Children) and complete (all books are Fiction or Nonfiction).
4. (a),(e),(f) are true; the rest are false
5.
(a) minimum: 1, maximum: 5
(b) Professor minimum/maximum: 0/1, Assistant minimum/maximum: 3/6,
(c) Professor(name,office,rank,course#,rating)
Assistant(name,office,years)
Course(course#,dept)
ATeach(name,course#)
(d) Professor: name
Assistant: name
Course: course#
Lteach: (name,course#)
(e) Professor.course# and Professor.rating must permit nulls