The following program is on Oracle-JAVA website. Explain the program and all the relevant terms in the program. package example. hello; import java. rmi. Remote; import java. rmi. RemoteException; public interface Hello extends Remote { String sayHello() throws RemoteException; } package example. hello; import java. rmi. registry. Registry; import java. rmi. registry. LocateRegistry; import java. rmi. RemoteException; import java. rmi. server. UnicastRemoteObject; public class Server implements Hello { public Server() {} public String sayHello() { return "Hello, world!"; } public static void main(String args[]) { try { Server obj = new Server(); Hello stub = (Hello) UnicastRemoteObject. exportObject(obj, 0); // Bind the remote object's stub in the registry Registry registry = LocateRegistry. getRegistry(); registry. bind("Hello", stub); System. err. println("Server ready"); } catch (Exception e) { System. err. println("Server exception: " + e. toString()); e. printStackTrace(); } } } package example. hello; import java. rmi. registry. LocateRegistry; import java. rmi. registry. Registry; public class Client { private Client() {} public static void main(String[] args) { String host = (args. length < 1) ? null : args[0]; try { Registry registry = LocateRegistry. getRegistry(host); Hello stub = (Hello) registry. lookup("Hello"); String response = stub. sayHello(); System. out. println("response: " + response); } catch (Exception e) { System. err. println("Client exception: " + e. toString()); e. printStackTrace(); } } }​