Is there any possible downside to using a business-to-customer model? Explain.
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- What is entity-relationship diagram?Draw EER diagram based on these business rules Customers can only make a reservation for themself and their invited guests. A customer may not make a reservation for other people including such as reselling rooms. A customer cannot use Park Hyatt website to reserve room related to any commercial activity. A customer need to provide the ID card or passport. A customer must check-in after 4 p.m. A customer must check-out before 12 p.m. A customer may select room before do the reservation. A customer can do online payment by credit card or pay while during check-in. A staff must check the customer ID card or passport.draw entity relationship diagram (ERD) for face recognition attendance system ? (for student attendance)
- How does an entity-relationship diagram work and what precisely is it?b) Model the following use case using a sequence diagram: M1: The customer provided an order request to Customer Interaction. M2: Customer Interaction sends the order request to the Customer Coordinator. M3, M4: Customer Coordinator sends an account request to Customer Account Service and receives the account information, including customer's credit card details. M5: Customer Coordinator sends the customer's credit card information to Credit Card Service. M6: Credit Card Service sends credit card approval to the Customer Coordinator. M7, M8: Customer Coordinator sends order request to Delivery Order Service. M9, M9a: Customer Coordinator sends the order confirmation to Customer Interaction and sends an email of the order confirmation to the customer via Email Service. M10: Customer Interaction outputs the order confirmation to the customer1. Create the initial ER diagram for a car dealership. The dealership sells both new and used cars, and it operates a service facility. Base your design on the following business rules: A salesperson can sell many cars, but each car is sold by only one salesperson. A customer can buy many cars, but each car is sold to only one A salesperson writes a single invoice for each car A customer gets an invoice for each car(s) he A customer might come in only to have a car serviced; that is, one need not buy a car to be classified as a When a customer takes in one or more cars for repair or service, one service ticket is written for each The car dealership maintains a service history for each car serviced. The service records are referenced by the car’s serial A car brought in for service can be worked on by many mechanics, and each mechanic can work on many A car that is serviced may or may not need (For example, parts are not necessary to adjust a carburetor or to clean a fuel…