use hand writing to include the cardinalities. data base

Problem $1$: Assuming that you are a database developer at a bookstore, please think of at least $3$ entities that you

would like to incorporate in your database. Add them and their attributes $($with identifier$)$ to the diagram and

explain their relationships in an ER diagram format. You must properly include the cardinalities on the

relationships.

Note: You cannot use CUSTOMER entity as a part of your answer.

Problem$2$: Give one example of each of the following relationship in an ER diagram format $($with their attributes

and identifier$).$ You must properly include the cardinalities on the relationships.

Note: The example cannot be the one from the textbook or the ones that I used in my lecture.

$2$a$.$ Unary Relationship

$2$b: Binary Relationship

$2$c: Ternary Relationship