Based on the given requirements, we can outline the following Entity-Relationship Diagram components: Entities (Subjects) and Attributes: 1. **Hospital** - HospitalID (Primary Key) - Name - Address - MaxBeds (The maximum number of beds in the hospital) 2. **SpecialtyRoom** - RoomID (Primary Key) - HospitalID (Foreign Key) - Specialty - NumBeds (Number of beds in the room) 3. **Staff** - StaffID (Primary Key) - HospitalID (Foreign Key) - Name - Role (Nurse or Internal Staff, not a doctor) - Shift (Morning, Afternoon, Night) - Salary (Annual Gross Salary) 4. **Doctor** - DoctorID (Primary Key) - HospitalID (Foreign Key) - Name - Specialty 5. **Patient** - PatientID (Primary Key) - RoomID (Foreign Key) - BedNumber - Name - Diagnosis Relationships (Verbs) and their Types: 1. **Hospital** contains **SpecialtyRoom**. - One-to-Many (1,N): A hospital is composed of multiple specialty rooms, but each specialty room belongs to only one hospital. 2. **Hospital** employs **Staff**. - One-to-Many (1,N): A hospital employs many staff members, but each staff member works at only one hospital. 3. **Hospital** employs **Doctor**. - One-to-Many (1,N): Each doctor depends on one hospital and cannot belong to several hospitals. 4. **SpecialtyRoom** accommodates **Patient**. - One-to-Many (1,N): A specialty room can accommodate multiple patients, but each patient is assigned to only one specialty room and one bed within that room. In this scenario, there is no direct relationship between the Staff/Doctor and the Patient in the given requirements, although in a real-world application, you would likely have relationships representing which staff or doctor is treating which patient. **Relational Model Tables**: 1. **Hospital** - HospitalID (PK) - Name - Address - MaxBeds 2. **SpecialtyRoom** - RoomID (PK) - HospitalID (FK) - Specialty - NumBeds 3. **Staff** - StaffID (PK) - HospitalID (FK) - Name - Role - Shift - Salary 4. **Doctor** - DoctorID (PK) - HospitalID (FK) - Name - Specialty 5. **Patient** - PatientID (PK) - RoomID (FK) - BedNumber - Name - Diagnosis Now, let's create the SQL code for these tables: ```sql CREATE TABLE Hospital ( HospitalID INT PRIMARY KEY, Name VARCHAR(255), Address VARCHAR(255), MaxBeds INT ); CREATE TABLE SpecialtyRoom ( RoomID INT PRIMARY KEY, HospitalID INT, Specialty VARCHAR(255), NumBeds INT, FOREIGN KEY (HospitalID) REFERENCES Hospital(HospitalID) ); CREATE TABLE Staff ( StaffID INT PRIMARY KEY, HospitalID INT, Name VARCHAR(255), Role VARCHAR(50), Shift CHAR(1), Salary DECIMAL(10,2), FOREIGN KEY (HospitalID) REFERENCES Hospital(HospitalID) ); CREATE TABLE Doctor ( DoctorID INT PRIMARY KEY, HospitalID INT, Name VARCHAR(255), Specialty VARCHAR(255), FOREIGN KEY (HospitalID) REFERENCES Hospital(HospitalID) ); CREATE TABLE Patient ( PatientID INT PRIMARY KEY, RoomID INT, BedNumber INT, Name VARCHAR(255), Diagnosis TEXT, FOREIGN KEY (RoomID) REFERENCES SpecialtyRoom(RoomID) ); ``` In these relationships: - The `HospitalID` in `SpecialtyRoom`, `Staff`, and `Doctor` is a foreign key that references the `Hospital` table to ensure that rooms, staff, and doctors are associated with one and only one hospital. - The `RoomID` in the `Patient` table is a foreign key that references the `SpecialtyRoom` table to ensure that a patient is assigned to a specific room. Would you like any more help or need the SQL code adjusted in any way?