SECTION B: Answer any $2$ of the $3$ questidns

Note: Please submit scans of your answers while on Grade Scope.

Question $1$: An $\frac{E}{R}$ diagram when converted to relations gives rise to the following relations:

$R(\frac{?}{\text{b}\text{a}\text{r}}(A)\frac{,}{b}ar(B),C)$

$S(\frac{?}{\text{b}\text{a}\text{r}}(A),D,H)$

$I(\frac{?}{\text{b}\text{a}\text{r}}\frac{(D{)}_{,}}{b}ar(F),G)$

You may assume that the same alphabets refer to the same attribute $($e$.$g$,$ the attributes $A$ in the relations $R,$ and $S.$ What $\frac{E}{R}$ diagram could have produced these relations? Please make sure all constraints are used to derive this schema.