I need help with java code to pass these tests ASAP added in the java junit test will understand what to do with it

@Test public void test03a() { Instructor alan = new Instructor("A. Wassyng", 70130, "jackie@eecs.yorku.ca"); Instructor mark = new Instructor("M. Lawford", 70139, "jonathan@yorku.ca"); Participant suyeon = new Participant("S. Y. Lee"); /* * Length of the returned array from `getRegistrations` corresponds to * the number of registrations added by the participant so far. * See the instructions PDF regarding the max number of registrations that can be added. */ Registration[] suyeonRegistrations = suyeon.getRegistrations(); String report = suyeon.getGPAReport(); /* empty list of registrations to begin with */ assertTrue(suyeonRegistrations.length == 0); /* GPA undefined over an empty list of registrations */ assertEquals("No GPA available yet for S. Y. Lee", report); /* non-registered courses have default marks -1 */ assertTrue(suyeon.marksOf("Intro. to OOP") == -1); assertTrue(suyeon.marksOf("Heavy Metal Music") == -1); assertTrue(suyeon.marksOf("Psychology I") == -1); Registration r1 = new Registration("Intro. to OOP", alan); /* add two registrations for suyeon * Hints: * - Are the two `addRegistration` calls denote the same method? * - Or an overloaded method (i.e., methods with the same name but distinct input parameter types)? */ suyeon.addRegistration(r1); suyeon.addRegistration("Heavy Metal Music"); assertTrue(suyeon.getRegistrations().length == 2 && suyeon.getRegistrations()[0] == r1 && suyeon.getRegistrations()[1].getTitle().equals("Heavy Metal Music") && suyeon.getRegistrations()[1].getInstructor() == null); assertTrue(suyeon.getRegistrations()[0].getMarks() == 0); assertTrue(suyeon.getRegistrations()[1].getMarks() == 0); assertTrue(suyeon.marksOf("Intro. to OOP") == 0); /* now a registered course */ assertTrue(suyeon.marksOf("Heavy Metal Music") == 0); /* now a registered course */ assertTrue(suyeon.marksOf("Psychology I") == -1); /* still a non-registered course */ suyeon.getRegistrations()[1].setInstructor(mark); assertTrue(suyeon.getRegistrations()[1].getInstructor() == mark); /* * Notice the format of GPA report: * - GPA value is displayed with 1 digit after the decimal point. * - The comma-separated list of `GradePoint (LetterGrade)` is surrounded by curly braces. * - There is a space after each comma and after the colon. */ assertEquals("S. Y. Lee's GPA of {0 (F), 0 (F)}: 0.0", suyeon.getGPAReport()); suyeon.updateMarks("Intro. to OOP", 61); suyeon.updateMarks("Heavy Metal Music", 79); /* non-existing course -> do nothing */ suyeon.updateMarks("Psychology I", 89); assertTrue(suyeon.getRegistrations()[0].getMarks() == 61); /* Grade: C; GP: 6 */ assertTrue(suyeon.getRegistrations()[1].getMarks() == 79); /* Grade: B; GP: 7 */ //assertTrue(suyeon.marksOf("Intro. to OOP") == 61); assertEquals(61,suyeon.marksOf("Intro. to OOP")); assertTrue(suyeon.marksOf("Heavy Metal Music") == 79); assertTrue(suyeon.marksOf("Psychology I") == -1); /* GPA = sum of GPs divided by number of courses */ assertEquals("S. Y. Lee's GPA of {6 (C), 7 (B)}: 6.5", suyeon.getGPAReport()); Participant yuna = new Participant("Y. Lee"); yuna.addRegistration(new Registration("Heavy Metal Music", mark)); yuna.addRegistration(new Registration("Intro. to OOP", alan)); /* Q. Can you understand the two occurrences of anonymous objects below? */ yuna.addRegistration(new Registration( "Psychology I", new Instructor("Tom", 70141, "tom@yorku.ca"))); yuna.updateMarks("Heavy Metal Music", 85); yuna.updateMarks("Intro. to OOP", 58); yuna.updateMarks("Psychology I", 66); assertTrue(yuna.getRegistrations()[0].getMarks() == 85); /* Grade: A; GP: 8 */ assertTrue(yuna.getRegistrations()[1].getMarks() == 58); /* Grade: D; GP: 5 */ assertTrue(yuna.getRegistrations()[2].getMarks() == 66); /* Grade: C; GP: 6 */ assertTrue(yuna.marksOf("Heavy Metal Music") == 85); assertTrue(yuna.marksOf("Intro. to OOP") == 58); assertTrue(yuna.marksOf("Psychology I") == 66); assertEquals("Y. Lee's GPA of {8 (A), 5 (D), 6 (C)}: 6.3", yuna.getGPAReport()); /* Suyeon and Yuna are classmates of two courses, * but the registration objects are distinct. */ assertEquals(suyeon.getRegistrations()[0].getTitle(), yuna.getRegistrations()[1].getTitle()); assertTrue(suyeon.getRegistrations()[0] != yuna.getRegistrations()[1]); assertEquals(suyeon.getRegistrations()[1].getTitle(), yuna.getRegistrations()[0].getTitle()); assertTrue(suyeon.getRegistrations()[1] != yuna.getRegistrations()[0]); /* At the end of the semester, clear registrations of students. */ suyeon.clearRegistrations(); yuna.clearRegistrations(); assertTrue(suyeon.getRegistrations().length == 0 && yuna.getRegistrations().length == 0); assertTrue(suyeon.getGPAReport().equals("No GPA available yet for S. Y. Lee") && yuna.getGPAReport().equals("No GPA available yet for Y. Lee")); String[] courses = {"Intro. to OOP", "Heavy Metal Music", "Psychology I", "Software Design"}; /* Q. Without the loop below, * how many lines of assertions need to be written explicitly? */ for(int i = 0; i < courses.length; i ++) { assertTrue(suyeon.marksOf(courses[i]) == -1); assertTrue(yuna.marksOf(courses[i]) == -1); } /* Next semester, students may choose to re-take some courses. */ suyeon.addRegistration("Heavy Metal Music"); suyeon.updateMarks("Heavy Metal Music", 99); assertTrue(suyeon.getRegistrations().length == 1); assertEquals("S. Y. Lee's GPA of {9 (A+)}: 9.0", suyeon.getGPAReport()); assertEquals("Heavy Metal Music has not yet been assigned an instructor", suyeon.getRegistrations()[0].getInformation()); }