User opens the shopping system

User logs in with user account credentials

User clicks on "Customize Search" button

User specifies search criteria based on preference and requirements

System displays a list of products matching the search criteria

System provides suggestions for related products that the user might be interested in

User selects desired product(s) and adds them to the cart

User repeats the above steps to add more products to the cart

User clicks on "Checkout" button

System displays the total bill and prompts the user to confirm payment

User enters credit card information

System processes payment and displays a confirmation message to the user

Create a class diagram with correct connections using this.