Question 1 (Mandatory) (3.5 points) Saved Cro destroy New User modiuser Genero boundary desboy gecided UserDetalGul create destroyo dUser modyusero wer Please choose the following statements that are true based on the class model shown. a) The class UserDetailGUI must implement the operations addUser(), modifyUser, and deleteUser() because they are abstract in the superclass. f) b). The class Main GUI must implement the operations create() and destroy() because they are abstract in the superclass. ( c) The class Main GUI must implement the operations getTitle() and setTitle() because they are abstract in the superclass. 1.) d) The name of the class systemGUI should appear in UpperCamelCase, but does not