Exercise $4\mathrm{.}5\mathrm{.}1$ : Convert the E$/$R diagram of Fig. $4\mathrm{.}29$ to a relational database schema.

Exercise $4\mathrm{.}5\mathrm{.}4$: Convert the following E$/$R diagrams to relational database schemas.

c$)$ Your answer to Exercise $4\mathrm{.}4\mathrm{.}4($a$).$

d$)$ Your answer to Exercise $4\mathrm{.}4\mathrm{.}4($b$).$