Question 0.4 1210 - 20Marks 4.1. Design a generalization specialization hierarchy for a motor-vrile sales company. The company sells motorcycles, passenger cars, Vans, and buses. Justify your placement of attributes at each level of the hierarchy. Explain why they should not be placed at a higher or lower level. 4.2. Consider a university database for the scheduling of classrooms for final exams. This database could be modeled as the single entity sct exam, with attributes course-name, section number, room.number, and time. Alternatively, one or more additional entity sets could be defined along with relationship sets to replace some of the attributes of the exam entity set as course with attributes name, department, and c-number section with attributes sumber and enrollment, and dependent as a weak entity set on course room with attributes pember, capacity, and building Show an E-R diagram illustrating the use of all three additional entity sets listed Question 0.4 1210 - 20Marks 4.1. Design a generalization specialization hierarchy for a motor-vrile sales company. The company sells motorcycles, passenger cars, Vans, and buses. Justify your placement of attributes at each level of the hierarchy. Explain why they should not be placed at a higher or lower level. 4.2. Consider a university database for the scheduling of classrooms for final exams. This database could be modeled as the single entity sct exam, with attributes course-name, section number, room.number, and time. Alternatively, one or more additional entity sets could be defined along with relationship sets to replace some of the attributes of the exam entity set as course with attributes name, department, and c-number section with attributes sumber and enrollment, and dependent as a weak entity set on course room with attributes pember, capacity, and building Show an E-R diagram illustrating the use of all three additional entity sets listed