Draw and clearly describe a step-by-step flowchart for a User Login system. Your login must include: Taking a Username and Password as input. Checking the database.
If correct: Granting access.
If wrong: Adding 1 to a failed attempts counter.
Access denied and block the account if the counter reaches 3.

ATM pin code flow chart (user input define). decision take (successful, failure)

Consider the following buy a product description. Customer browses catalog, selects items to buy and then goes to check out. Customer fills in shipping information (address, receive time). System presents full pricing information and customer fills in credit card information. System authorizes purchase,confirms sale and sends confirming email to customer. Draw a use case diagram for the above system.