Q19 3 Points A relationship in an ER model maps to a relation when O It is a 1:N relationship It is a N:M relationship It is a weak entity relationship It is a binary relationship It is a multi-valued relationship Q20 3 Points A relationship in an ER model maps to a foreign key In the relation on the N side of a 1:N relationship In the relation on the N side of a N:M relationship In both relations of a N:M relationship In the relation on the 1 side of a 1:N relationship In the relation on the M side of a N:M relationship