Question: s ) Suppose that a relation A has a schema ( a , b , c , d ) where { a , b }

s) Suppose that a relation A has a schema (a,b,c,d) where {a,b} is the primary key. Suppose that relation B has a schema (c,e,a) with a primary key {c}. Could the attribute a be a foreign key in B referencing A? Justify your answer.
s) Suppose that a relation A has a schema (a,b,c,d) where

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