Q$19-$Q$20$ are based on the following business requirement for HR management system. You have just joined a firm that follows a matrix structure and discover that you now have three bosses. One of your bosses has many people working for her, and many many of these people also work for other bosses. She knows that the organization has a problem keeping track of the many boss$-$employee relationships. Thus, she has assigned you to draw a data model so she can assign someone else to develop the database. Other detailed employee information also needs to be recorded: first name, last name, gender, salary, tenure, etc.