Question: 1. Consider the education database once again. Show what is involved in
(a) deleting an enrollment,
(b) deleting an employee,
(c) deleting a course (assuming in every case that the OPAL-style garbage collection process applies).
State any assumptions you make regarding such matters as "DELETE CASCADES," "DELETE RESTRICTED," etc
2. Servio Corporation. Gem Stone Reference Manual. Beaverton, Ore. (1990).