Help me out with problem 4.3 please 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. Solution a) instance for the given relation (\"Formal Languages and Automata Theroy\",\"C K NAGPAL\",\"ISBN 0-19-807 106- X\",\"Oxfor press\",\"05-07-2012\",\"London\",\"4\") Title : Formal Languages and Automata Theroy Author:C K NAGPAL ISBN : ISBN 0-19-807 106-X Publisher:Oxfor press Pubdate:05-07-2012 Pubcity:London QTYonhand : 4 b) Primary key: is a column which can used to uniquely identify, a row in table in the above relation primary key is isbn because every unique isbn number, so that we can be used to uniquely identify a row candidate key : is a column or set of columns which can uniquely identify a row in a table.. in the above relation canditate keys are isbn, [title,author,pubdate] are canditate keys; by using them we can uniquely indentify a row super key:- if we add any other column to primary key then it becomes super key super keys are [isbn,title],[isbn,author],[isbn,publisher] etc.