diff --git a/Human.java b/Human.java
new file mode 100644
index 0000000..0de3674
--- /dev/null
+++ b/Human.java
@@ -0,0 +1,20 @@
+public class Human {
+    private String fullName;
+    final String staticPrintOutput = "this function should always print this string in all subclasses";
+
+    public String getFullName() {
+        return fullName;
+    }
+
+    public void setFullName(String fullName) {
+        this.fullName = fullName;
+    }
+
+    public void sayMyName() {
+        System.out.println("im a human!");
+    }
+
+    public String staticPrint() {
+        return staticPrintOutput;
+    }
+}
diff --git a/Main.java b/Main.java
new file mode 100644
index 0000000..d2fa2bb
--- /dev/null
+++ b/Main.java
@@ -0,0 +1,21 @@
+//TIP To <b>Run</b> code, press <shortcut actionId="Run"/> or
+// click the <icon src="AllIcons.Actions.Execute"/> icon in the gutter.
+public class Main {
+    public static void main(String[] args) {
+        Human student = new Student("Arian");
+        Human professor = new Professor("Ahmadi","idk");
+
+        student.sayMyName(); // Q7
+        System.out.println("-------------");
+        professor.sayMyName(); // Q8
+
+        System.out.println("-------------");
+
+        if (student instanceof Human) { //Q6
+            System.out.println("student is instance of human");
+        }
+        if (professor instanceof Human) {
+            System.out.println("professor is instance of human");
+        }
+    }
+}
\ No newline at end of file
diff --git a/Professor.java b/Professor.java
new file mode 100644
index 0000000..18adccd
--- /dev/null
+++ b/Professor.java
@@ -0,0 +1,35 @@
+public class Professor extends Human {
+    private String professorFaculty;
+    private int numberOfCourse;
+    private String professorSpecialty;
+
+    Professor(String name,String faculty) {
+        setFullName(name);
+        setProfessorFaculty(faculty);
+    }
+
+    @Override
+    public void sayMyName() {
+        System.out.println("Im "+ getFullName()+"\nand my faculty is "+ professorFaculty);
+    }
+
+    public void setProfessorFaculty(String professorFaculty) {
+        this.professorFaculty = professorFaculty;
+    }
+    public void setNumberOfCourse(int numberOfCourse) {
+        this.numberOfCourse = numberOfCourse;
+    }
+    public void setProfessorSpecialty(String professorSpecialty) {
+        this.professorSpecialty = professorSpecialty;
+    }
+
+    public String getProfessorFaculty() {
+        return professorFaculty;
+    }
+    public int getNumberOfCourse() {
+        return numberOfCourse;
+    }
+    public String getProfessorSpecialty() {
+        return professorSpecialty;
+    }
+}
diff --git a/Q9.pdf b/Q9.pdf
new file mode 100644
index 0000000..186cf5b
Binary files /dev/null and b/Q9.pdf differ
diff --git a/Student.java b/Student.java
new file mode 100644
index 0000000..d30dad8
--- /dev/null
+++ b/Student.java
@@ -0,0 +1,34 @@
+public class Student extends Human {
+    private int studentNumber;
+    private String majorName;
+    private String universityName;
+
+    Student(String name) {
+        setFullName(name);
+    }
+
+    @Override
+    public void sayMyName() {
+        System.out.println("Im "+ getFullName());
+    }
+
+    public void setStudentNumber(int studentNumber) {
+        this.studentNumber = studentNumber;
+    }
+    public void setMajorName(String majorName) {
+        this.majorName = majorName;
+    }
+    public void setUniversityName(String universityName) {
+        this.universityName = universityName;
+    }
+
+    public int getStudentNumber() {
+        return studentNumber;
+    }
+    public String getMajorName() {
+        return majorName;
+    }
+    public String getUniversityName() {
+        return universityName;
+    }
+}