a) Draw a block diagram to illustrate the architecture of online-shopping books web-based application. The functional requirements for the system are follows: The system shall enable the user to search a book by title, publisher and author. The system shall allow the user to choose the book and update the cart The system shall allow the user to pay via online banking or credit/debit card The system shall allow user to register of buyer or seller The system shall enable the seller to update their list of product The system shall enable the buyer or seller to print the transaction history