Draw a Data Flow Diagram $($DFD$)$:

Healthcare Appointment System

External Entities:

Patients

Doctors

Service Providers

Receptionists

Administrators

Processes:

Healthcare Appointment System: Represents the entire system as a single process.

Data Flows:

Appointment Requests

$($

From Patients

$)$

: Represents the flow of appointment requests from patients to the system.

Appointment Information

$($

To Doctors, Service Providers, and Receptionists

$)$

: Represents the flow of appointment details to doctors, service providers, and receptionists.

User Authentication and Authorization

$($

To System

$)$

: Represents the flow of authentication and authorization data to the system from users.

Patient Information Updates

$($

From Receptionists and Doctors

$)$

: Represents the flow of updated patient information from receptionists and doctors to the system.

System Notifications

$($

To Patients and Doctors

$)$

: Represents the flow of notifications from the system to patients and doctors.

External Entities Interactions:

Patients: Request appointments, receive appointment confirmations, and update personal information.

Doctors: Receive appointment information, modify appointments, and view patient information.

Service Providers: Receive appointment information.

Receptionists: Manage appointments, add patient information, and cancel appointments.

Administrators: Manage user accounts, update system configurations, and handle access control.