2. Consider the entity-relationship diagram below: aid ema1l gender integer is client of text text char PhoneNum text birthdate dat togethe date text What do the constraints on the three relationship types (is client of, developing, contracted to work together) indicate about the participation and cardinality of the related entity types? (note that the box containing contractDate is not an entity, contractDate are attributes of the relationship type contracted to work together.) Derive and show a relational database schema from the entity-relationship diagram in problem 2. Develop primary and foreign keys as appropriate to represent the relationship types of the ER diagram. Remember to develop a relational database table for any relationship type that requires it. Use the schema format describe in the course project. Implement your relational database schema from problem 3 using the SQL DDL. 3. 4