Hands-on practice in database design is important. Usea relational DBMS to implement the integrated REAdata model presented in this chapter, or one of the integrateddata models from the homework problems, ora model provided by your instructor. Then, perform thefollowing tasks:1. Write a query to calculate total accounts receivable.2. Write a query to calculate accounts receivable for aspecific customer.3. Create a sales invoice form that references the appropriatetables and inputs data about attributes intothe proper tables.4. Write queries to calculate as many financial statementitems as possible from the data model youimplement.5. Design appropriate input controls to ensure thevalidity of data entered in the form created instep 3.