***NEED HELP ASAP PLEASE WITH THIS PROBLEM!** - SIMPLE UNDERSTANDING PLEASE!

Consider the following classes/interfaces. public interface GUIElement { public void addListener(/*...*/); } public class SingleButton implements GUIElement { public SingleButton(String label) {/*...*/} public void addListener(/*...*/) {/*...*/} } public class RadioButton Set implements GUIElement { public RadioButtonSet(String[] labels) {/*...*/} public void ad tener(/*...*/) {/*...*/} } Rewrite this class hierarchy to use the static factory pattern