Stuck on how to start and how to fill up these codes. badly need help!

*Code doesn't need to run completely or show output just need to fill up missing codes and complete implementing the incomplete classes among the provided starter-code files basically I just need a foundation or basis on how to start. for example, just do the first 6 java file provided.

person.java,general manager.java etc

"To do: "Our Graduation ceremony will be hosted in Oracle Park, home of the Giants. The SF Giants are asking us to make an application that acts like a messenger to help them take SF Giants Thank You card orders from SFSU students."

Starter codes:

//Person.java package assignment02PartB; // Please organize all the given files in 1 same package // Please make sure to read the provided "_ListOf-PleaseDoNotChange.txt" // JAVA 15, 2020, added "sealed" and "permits" to Java classes. // We are learning the new elements of JAVA 15. // "sealed" and "permits" are used here so that we will have one more example to reference. // We do not need to understand "sealed" and "permits" in order to start and complete the assignment. public sealed abstract class Person implements Greeting permits Student, Player, President, GeneralManager, Manager { // // Instance Data Fields // // // Constructors // public Person() { } // Instance Methods // // Language // // // @override // }

//Player.java package assignment02PartB; // Please organize all the given files in 1 same package // Please make sure to read the provided "_ListOf-PleaseDoNotChange.txt" public final class Player extends Person { // Instance Data Fields // // Constructors // public Player() { } // // Instance Methods // // // Additional Instance Methods // // // Language // // // @Override // } 

//President.java package assignment02PartB; // Please organize all the given files in 1 same package // Please make sure to read the provided "_ListOf-PleaseDoNotChange.txt" public final class President extends Person { // // Instance Data Fields // // // Constructors // public President() { } // // Instance Methods // // // Language // // // Override // } 

//Manager.java package assignment02PartB; // Please organize all the given files in 1 same package // Please make sure to read the provided "_ListOf-PleaseDoNotChange.txt" public final class Manager extends Person { // // Instance Data Fields // // // Constructors // public Manager() { } // // Instance Methods // // // Language // // // Override // }

//Student.java package assignment02PartB; // Please organize all the given files in 1 same package // Please make sure to read the provided "_ListOf-PleaseDoNotChange.txt" import java.util.ArrayList; public final class Student extends Person { // // Instance Data Fields // // // Constructors // public Student() { } // // Instance Methods // // // Additional Methods // // // Language // // // Override // }

//GeneralManager.java package assignment02PartB; // Please organize all the given files in 1 same package // Please make sure to read the provided "_ListOf-PleaseDoNotChange.txt" public final class GeneralManager extends Person { // // Instance Data Fields // // // Constructors // public GeneralManager() { } // // Instance Methods // // // Language // // // Override // }

*screenshots of codes: