Fill in the blanks (Q1-Q15) by a choosing your answer from the word list below: abstract polymorphism base type ToStringreference Object class overload override inheritance this void static Format ivate rotected virtual Note: words listed above may be used more than once or never be usedy 1. If a class contains at least one abstract method, it must be declared as a(n) 2. class. involves using a base class variable to invoke methods declared in base class and overridden in the derived classes, enabling you to "program in the general." 3. is a form of software reusability in which new classes acquire the members of existing classes and enhance those classes with new capabilities. 4. A base class's members can be accessed only in the base class declaration and in derive class declarations 5. Derived class constructors can call base class constructors via the keyword. 6. Methods in a class that do not provide implementations must be declared using keyword 7. If you want to override a method in a derived class, the method must be declared using keyword returns a formatted string rather than displaying a string in a console window. where a string is needed. , o rin the base class. 8. The static method of String class is similar to method console. write, but 9. An object's 10. A(n) 11. When a derived class redefines a base class method by using the same signature and return- method can be called implicitly when an object appears in code variable represents class-wide information that is shared by all the objects of the class of theclass.. type, the derived class is said to that base class method. 12. An array is a group of variables containing values that all have the same 13The keyword 14. It is possible to have several methods with the same name that each operates on different indicates that a method does not return a value. types or numbers of arguments in a class declaration. This feature is called method 15. Every class directly or indirectly extends the class