An employee may take one exam; an exam is taken by one employee.

A patient makes many appointments; an appointment is made by one patient.

A delivery is made by one vehicle; a vehicle may make many deliveries.

A book may be written by many authors; an author writes many books.

Write the answers on the page itself. For the following partial ERDs, using the business rules as given, do the following for each one:

put in an appropriate Primary Key $($PK$)$

put in a Foreign Key $($FK; if necessary$)-$ ensure you indicate it as such!

put in the relationship name $($both sides!$),$ in the correct place

put in maximum cardinality

put in one additional attribute $($your choice, but it must make sense$)$