Questions: As it's drawn in Figure 3.6, draw an ER diagram for each scenario of the following: A. In a library database, the author can write more than one book, and the book can be written by more than one author, and the book must be followed for one topic only. B. In a hospital database, the doctor can see more than one patient, and the patient must be seen by one doctor. C. In a university database, a teacher can teach more than one section, and the section is for one course only, and one teacher must teach it