Question $2(10$ points$)$ v SavedA relation has only one primary key, a candidate key designed as the primary one. True FalseQuestion $3(10$ points$)$A foreign key in a relation R$1$ is a candidate key in a relation R$2.$ True FalseQuestion $4(10$ points$)$A check constraint is inter$-$relational. True FalseQuestion $5(10$ points$)$A foreign key constraint is intra$-$relational. True FalseQuestion $6(10$ points$)$Check all that apply. We consider the constraint: A class start time must be before its end time. The constraint is $...$Dynamic$]$ Static Semantic$0)$ Structural$/$syntactic