In Chapter 7, you developed a use case diagram, a fully developed use case description or activity diagram, and a system sequence diagram for the real estate company’s use cases. In Chapter 11, you developed a three-layer design and a set of CRC cards for a particular use case. Based on those solutions or others provided by your teacher, develop a first-cut sequence diagram for the problem domain classes. Next, add view layer and data access layer objects to the sequence diagram. Convert the domain class diagram to a design class diagram by typing the attributes and adding method signatures.