A good answer might be:

The revised class is seen below.

Choice of Methods

Now objects of the YouthBirthday class have two methods: greeting(), and greeting( String ). 

// Revised version
//
class YouthBirthday  extends Birthday

{
  public  YouthBirthday ( String r, int years )
  {
    super ( r, years )
  }

  // additional method---does not override parent's method
  public void greeting( String  sender )
  {
    super.greeting();
    System.out.println("How you have grown!!\n");
    System.out.println("Love, " + sender +"\n" );
  }
}

Here is a YouthBirthday object using each of its two methods: 
YouthBirthday yBday = new YouthBirthday( "Henry", 12 );
yBday.greeting();
yBday.greeting( "Alice" );

QUESTION 12:

What will this program fragment write out?

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