I need some help coding this file. The Scheduler class is responsible for maintaining lists of students and courses, and for placing students into courses correctly. I cant add the tests due to its large length. If desired, I will comment it. Thank You.

package scheduler;

import java.util.List;

public class Scheduler { /** * Instantiates a new, empty scheduler. */ public Scheduler() { } /** * Adds a course to the scheduler. * * @param course the course to be added */ public void addCourse(Course course) { } /** * Returns the list of courses that this scheduler knows about. * * This returned object does not share state with the internal state of the Scheduler. * * @return the list of courses */ public List getCourses() { return null; } /** * Adds a student to the scheduler. * * @param student the student to add */ public void addStudent(Student student) { } /** * Returns a list of the students this scheduler knows about. * * This returned object does not share state with the internal state of the Scheduler. * @return */ public List getStudents() { return null; } /** * Assigns all students to courses in the following manner: * * For a given student, check their list of preferred courses. Add them to the course that: * - exists in the scheduler's list of courses * - the student most prefers (that is, comes first in their preference list) * - the student is not not already enrolled in * - and is not full (in other words, at capacity) * Adds courses to the *end* of the student's current list of classes. Adds students to * the *end* of the course's roster. * * Repeat this process for each student, one-by-one; each student will now have one course, * usually (but not always) their most preferred course. * * Then repeat this whole process (adding one course per student, when possible, proceeding * round-robin among students), until there is nothing left to do: Students might * all be at their maximum number of courses, or there may be no available seats in courses * that students want. */ public void assignAll() { }

/** * Drops a student from a course. * * @param student * @param course * @throws IllegalArgumentException if either the student or the course are not known to this scheduler */ public void drop(Student student, Course course) throws IllegalArgumentException { } /** * Drops a student from all of their courses. * * @param student * @throws IllegalArgumentException if the student is not known to this scheduler */ public void unenroll(Student student) throws IllegalArgumentException{ } }