Please create an ER diagram for the following database system:

$1.$ Description of System

For a physical therapy clinic, the database system will handle patient data, appointments, treatment plans, therapist schedules, and billing records. The system seeks to guarantee accurate record$-$keeping, improve patient care, and streamline operations.

$2.$ Mission Statement

To offer a thorough and effective database system that facilitates the provision of superior physical therapy services by efficiently managing patient information, treatment modalities, and clinic operations.

Mission Objectives

$$ To keep current and accurate patient records.

$$ To effectively plan and oversee patient appointments.

$$ To monitor and record treatment strategies and advancements.

$$ To coordinate the availability and schedules of therapists.

$$ To appropriately manage insurance claims and billing.

$3.$ Entities and Attributes

$$ Patient $$

o$$ Patient ID

o$$ First Name

o$$ Last name

o$$ Date of birth

o$$ Address

o$$ Phone number

o$$ Email

o$$ Medical History

$$ Therapist

o$$ Therapist ID

o$$ First name

o$$ Last name

o$$ Specialization

o$$ Phone number

o$$ Email

$$ Appointment

o$$ Appointment ID

o$$ Patient ID

o$$ Therapist ID

o$$ Appointment date

o$$ Appointment time

o$$ Status

$$ Treatment Plan

o$$ Treatment Plan ID

o$$ Patient ID

o$$ Therapist ID

o$$ Start date

o$$ End date

o$$ Treatment details

$$ Billing

o$$ Billing ID

o$$ Patient ID

o$$ Appointment ID

o$$ Amount

o$$ Insurance details

o$$ Payment status