Consider the Entity Relational $($ER$)$ schema of relation R$=($A$,$ B$,$ C$,$ D$,$ E$($E$1,$ E$2))$; knowing that there are the following functional dependencies $($f$.$d$.)$: fd$1$: $\{$A$,$ C$\}\{$B$,$ E$\}$ fd$2$: $\{$A$\}\{$D$\}1.$ Can you guess the primary key attribute$($s$)?$ Justify your answer $2.$ Is R in $1$NF$?$ If $$yes$$ why? If not modify R so as to put it in $1$NF$.$ Let us call R$1$ the result of this step $3.$ Is R$1$ in $2$NF$?$ If $$yes$$ why? If not modify R$1$ so as to put it in $2$NF$.$ Let us call R$2$ the result of this step $4.$ Is R$2$ in $3$NF$?$ If $$yes$$ why? If not modify R$3$ so as to put it in $3$NF Question$2$: Knowing the relational schema of the Company database: $1.$ Write a relational algebra query to derive the new relation: EMP$\_$DEP$=($ENAME$,$ SSN$,$ BDATA, ADDRESS, DNAME, DMGRSNN$)2.$ Populate your new relation with at least $5$ entries, $3.$ Discuss insertion, deletion and modification anomalies.