Design a generalization–specialization hierarchy for a motor vehicle 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.

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Study the details below and create ERD diagram for each question below. Drone / Video: a Drone may take many Videos; a Video is taken by one Drone. A Video instance is optional for a Drone; a Drone instance is required for a Video. A Facility may be recorded by many Videos; a Video records one Facility. A Video instance is optional for a Facility; a Facility instance is required for a Video. A Video may be the basis of many Analyses; an Analysis is based on one Video. An Analysis instance is optional for a Video; a Video instance is required for an Analysis

Assume you've been given the task of developing a logical model of a school or college's registration system. Would a top-down approach be preferable, or would a bottom-up approach be preferable? What factors might impact your choice?