Exercise $4\mathrm{.}3(\{$part a:$1,$ part b:$3\})$:

Consider the relation schema containing book data for a bookstore:

Book $($title$,$ author, isbn, publisher, pubDate, pubCity, qtyOnHand$)$

a$.$ Write out the table for an instance of this relation.

b$.$ Identify a superkey, a candidate key, and the primary key, writing out any assumptions you need to make to justify your choice.