Construct a UML class diagram showing how the Observer pattern can be used to keep the LeaderBoard and NewsFeed informed and updated when changes occur in the Election Results. Be sure to use Javas inbuilt observer pattern. Show key associations between classes and key operations.

How does Java support the Observer role?

How does Java support the Observable role?

public class ElectionResults class NewsFeed class LeaderBoard String currentLeader LeaderBoard0 int democrats; int republicans; int crazies; void ElectionResults0 int newsDemocrats; int newsRepublicans; int newsCrazies; currentLeader "Unknown void NewsFeed void postleader(l democrats 0 republicans 0; crazies 0; newsRepublicans 0; System.out.printf("The current leader is %s", currentLeader String getCurrentWinner( // Compute current winner here return currentWinner; System.out.printf("Democrats %d. Republicans %d, Crazies %d" newsDemocrats, newsRepublicans, public static void main(String[] args)i ElectionResults resultsnew ElectionResults); results.addNewResults(10,8,13); results.addNewResults(12,7,8) void addNewResults(int dems, int reps, int craz)I democratst dems; republicans+ reps; crazies+=craz