1. What is the difference between a superclass and a subclass? 2. Since a subclass does not inherit the superclass’s constructors and private data fields, how does the subclass’s constructor...

1. What is the difference between a superclass and a subclass?

2. Since a subclass does not inherit the superclass’s constructors and private data fields, how does the subclass’s constructor initialize those data fields?

3. Must a constructor’s definition in a subclass explicitly invoke a constructor in the superclass by using super? Explain.