$1\mathrm{.}1.$ The entity types, relationship types, and corresponding attributes are as follows:Entity Types: Department, Employee, Patient, Operation, Acquaintance.Attributes:Department: ID$,$ Name, Phone Number, Locations, Manager $($Doctor$).$Employee: Name, Social Security Number, Job Type, Salary, Address, Office Phone Number, Cell Phone Number, Gender, Age, Birth Date, Department.Patient: Name, ID$,$ Social Security Number, Gender, Birth Date, Blood Type, Home Address, Acquaintance Information.Operation: ID$,$ Name, Time, Location, Doctors, Nurses, Patient.Acquaintance: Name, Relationship, Phone Number.Relationship Types:Manages: between Doctor and Department.Works for: between Employee and Department.Supervises: between Employee and Employee.Makes appointment with: between Patient and Doctor$/$Nurse$.$Performs: between Doctor and Operation.Undergoes: between Patient and Operation$\mathrm{.}1\mathrm{.}2.$ The degree with respect to each relationship type is as follows:Manages: Binary relationship $($Doctor and Department$).$Works for: Binary relationship $($Employee and Department$).$Supervises: Binary relationship $($Employee and Employee$).$Makes appointment with: Binary relationship $($Patient and Doctor$/$Nurse$).$Performs: Binary relationship $($Doctor and Operation$).$Undergoes: Binary relationship $($Patient and Operation$)\mathrm{.}1\mathrm{.}3.$ The structural constraints of all the relationship types are as follows:Manages: Each department is managed by one doctor, and a doctor can manage only one department.Works for: Each employee works for one department, and a department can have multiple employees.Supervises: An employee can supervise multiple employees, but each employee is supervised by only one employee.Makes appointment with: A patient can make multiple appointments with doctors or nurses, and a doctor or nurse can have appointments with multiple patients.Performs: A doctor can perform multiple operations, and an operation can be performed by multiple doctors.Undergoes: A patient can undergo multiple operations, and an operation can be undergone by multiple patients.