Cоurse Selectiоn Dаtаbаse Design (Part 1) — E/R diagram Instructiоns You're designing a course selection database for a university. Fill in the blanks based on the E/R diagram for this system. To help visualize the structure, draw the E/R diagram on scratch paper. You're not required to submit the ER diagram. Entities Involved students, courses, teachers, departments Given Information Each student has a unique student ID, a name and age. Each course has a unique name, and time slots and classroom number. Each teacher has a unique teacher ID and name. Each department has a unique department name, an address and a department chair. Additional Information Each student can take several courses. Each course can be taught by only one teacher. Each teacher can teach several courses. Each teacher and each course should only be administered by one department. Fill in the Blanks Entity students has attributes [students_attr1]. has a [students_rel_type1] relationship [students_rel1] to entity [students_ent1]. Entity courses has attributes [courses_attr1]. has a many-to-many relationship [courses_rel1] to entity [courses_ent1]. has a [courses_rel_type2] relationship [courses_rel2] to entity departments. has a [courses_rel_type3] relationship [courses_rel3] to entity [courses_ent3]. Entity teachers has attributes [teachers_attr1]. has a one-to-many relationship [teachers_rel1] to entity [teachers_ent1]. has a [teachers_rel_type2] relationship [teachers_rel2] to entity [teachers_ent2]. Entity departments has attributes [departments_attr1]. has a [departments_rel_type1] relationship [departments_rel1] to entity courses. has a [departments_rel_type2] relationship [departments_rel2] to entity [departments_ent2]. In the E/R diagram entities use [diagram1] shapes. attributes use [diagram2] shapes. relationships use [diagram3] shapes. a key attribute has its text [diagram4] to indicate uniqueness.