Question $2$: Draw an $\frac{E}{R}$ diagram to model project groups in the course CSC$430.$ Keep in mind that each enrolled student $($identified by a SID$)$ can work at most one project. Each project is identified uniquely by its name. Ensure all the appropriate referential integrity constraints in the diagram. Indicate primary key, and foreign keys in each relation. $(15$ points$)$

Question $3$: Consider the relational database whose schema is shown below:

EMPLOYEE $($Emp$-$ID$,$ E$-$name, gender, DOB, disability, Edu$\_$qualif.$)$