Please provide the graphics $($actual graphics requested are really important $-$Don't just input answers without a proper drawn graphic $,$otherwise is not valid$)$

An online hospital application provides a platform for patients to make

an appointment with doctors, pay for appointments, view the information

of medical checks, pay for medical checks, etc. Patients need to register

in the system by creating an account in the system with a unique

username and password. Patients can't make appointments with doctors

only after the accounts are authenticated by providing identification card

numbers or medical insurance numbers. The application lists all doctors

of the hospital. After a doctor is selected, the schedule of the doctor is

displayed. The schedule of a doctor contains several available time

intervals $($ATI$).$ Each ATI could be reserved by at most $10$ patients. After

a patient selects an ATI, an appointment could be made and paid. At the

time of an appointment, the patient comes to the doctor and the doctor

may make a medical check appointment including several medical checks

for the patient in the application. The patient could view the information

of the medical checks and needs to pay for the medical checks before

undergoing the medical checks. At the time of the medical checks, the

patient comes to the hospital and undergoes the medical checks. After

that, the patient can query the check results and download them after the

check results have been submitted by the hospital.

$(1)$ Prepare a domain class diagram for this software including classes

"User, Account, Appointment, Doctor, Schedule, ATI, Medical$-$check$-$

appointment, Medical$-$check, etc"

$(2)$ Add appropriate properties to classes in the domain class diagram.

$(3)$ Build a state diagram for the class Medical$-$check including states

"unpaid, paid, checked, report$-$obtained, canceled". Tips:after the medical

check is undergone, doctors need to check whether the sample data of the

check is qualified. If it is qualified, the sampled data is analyzed and a

formal report is generated and submitted by the doctors for the check.

Otherwise, the patient need to undergo the check again. The medical

check can only be canceled before the check is undergone.

$(4)$ Build an activity diagram to describe the process of making an

appointment. Tips for the process: A user first needs to login into the

system. Next, the system checks whether the account is authenticated. If

it is not, the system switches into the authenticating page. Otherwise, the

system shows the doctor ATI selecting page. After the ATI is selected,

the appointment can be submitted successfully only when the

ATI is reserved by not more than $10$ patients. Otherwise, the system gives

a notice to user and changes to the ATI selecting page.