UML Diagrams

Draw a sequence diagram for a supermarket electronic point of sales system (EPOS)- A sequence diagram is used to show the interaction between objects and the sequential order in which thwe interactions occur Show the expected interaction between the user, hardware, and software- Sales: -Scan the upc barcode through the camera, extract the barcode -Process barcode for string comparison in Database - Press Cash, to finalize the Transaction -Store the transaction in the Database, for reporting and refund purposes. -Void button- lets the user remove a particular product from the transaction before finalizing it. -Update inventory after the sale has been finalized. Buttons: Enter UPC, Price Check, Price Override, Void, Cash, Credit Debit, back Tables: Item Barcode, Price, Item Name Refunds: - Allow the user to return a specific item, or the entire transaction that was previously made. - Prompt the user for Transaction ID, Purchase Date. - Display the Entire transaction from the information provided by the user. - Add products back to the database that are returned. - Display the amount being refunded after item has been selected. - Back button- Should take the user back to home screen. Buttons: Get Transaction Details, Return Item, Return Sale, Back Employee Management System: - Allow the Employee to clock in,clock out.(Store the hours worked in database). - Display the Payroll information to admin with Emp ID, Emp Name, Hours Worked, Pay Rate, Tax Percent, Gross Pay(Before tax deduction), Gross Pay(after tax deduction). - Display total hours worked by all employees in the week. - Allow admin to add login user Tables: Emp ID, Emp Name, Hours Worked, Pay Rate, Tax Percent, Gross Pay,Back Sub-buttons: clock in/clock out, payroll, add new user, back Reports: Sales: - Display 4 options (Daily, Monthly, Yearly, Custom Date) - In a Sales report display total amount of sales, along with tax Refunds: - Display refund reports(By Custom Date) with Emp ID, Emp Name, Refund amount, Transaction Id, time Voids: - Display void reports(by Custom Date) with Emp ID, Emp Name, void amount, item name, transaction Id, time Buttons: Daily, Monthly, Yearly, Custom Date, Back, Inventory Management System: - View/Modify Inventory - Display Current Inventory -Allow user to change prices -Allow user to add or remove an item from inventory -OrderList - Add the items that are less than 10 units in inventory to OrderList (items < 10). - Give the user option to print and delete the report. Customer loyalty Overview: User and admin 5 points for every pound spent Add New Customer - Let user add new customer details in the loyalty program( Customer Name, Qrcode) - Add the points to their name once transaction is finalized. View Customer Loyalty Information - Display customer information along with points - For every 1000 points earned give customer £20 discount on the total purchase. Deduct the points used and make it 0 if they had 1000. - Show points earned on every transaction.