Assume that the following attributes are the primary keys for the tables:

emp_code is the primary key for Employee table

job_code is the primary key for the Job table

plan_code is the primary key for the Plan table

emp_code, plan_code is a composite primary key for the Benefit table

job_code, plan_code is the composite primary key for the Extra_Benefit table

(2 Points) Do all tables exhibit entity integrity? Answer yes or no and then explain your answer.

1.2 (2 Points) For each table in the database, identify foreign key(s) (if any). For each foreign key, state the referencing relation and the referenced relation.

1.3 (2 Points) Do all tables exhibit referential integrity? Answer yes or no and then explain your answer.