a. Create a data flow diagram of the current system.
b Create a system flowchart of the existing system
c. Analyze the internal control weaknesses in the system. Model your response according to the six categories of physical control activities specified in SAS 78/COSO.
d. Prepare a system flowchart of a redesigned computer- based system that resolves the control weaknesses you identified. Explain your solution.

Walker Books, Inc., is one of the fastest-growing book distributors in the United States. Established in 1981 in Palo Alto, California, Walker Books was originally a side project of founder and current president Curtis Walker, who at the time was employed by a local law firm. Because reading was much more than just a hobby of his, he decided to use some of his savings to buy an abandoned restaurant and convert it into a neighborhood bookstore, mainly selling used books that were donated and obtained from flea markets. When the doors first opened, Walker’s wife, Lauren, was the only employee during the week and Curtis worked weekends. At the end of the first fiscal year, Walker Books had grossed $20,000 in sales.