Consider a relation $R$ with Seven attributes $T,U,E,S,D,A,Y.$ You are given the following dependencies:

$SEY$

$TA$

$TDU$

$ADE$

$YS$

Its candidate keys are $\{(T,D,S),(T,D,Y)\}.$

Tasks:

Q$1.$ List non$-$prime attributes $$ of the relation $R.$

Q$2.$ Which of the following is a Not So Bad functional dependence? $($Enter A$,$ B$,$ C$,$ or D$)$

A$.YS$

B$.TA$

C$.ADE$

D$.$ TD $U$

Q$3.$ The relation $R$ is in $($Enter $1$NF$,2$NF$,3$NF$,$ or BCNF$)$