A. Using JOptionPane input dialog, write a statement to input the person's age (integer). B. What does the getActionCommand method of the ActionEvent class return? C. What is the difference between textArea.setText "Hello") and textArea.append ("Hello")? D. To which object do we register as an action listener-JMenu, JMenultem, or JMenuBar? E. What is the purpose of the isMetaDown method? F. What is the purpose of a layout manager? G. What is the purpose of the instanceof operator? H. How does the flow layout place the components? I. How do we get the text of a selected menu item in the actionPerformed method? J. What is the difference between mouseClicked and mousePressed? K. Identify the GUI components in the given picture