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2 a) 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. Justify their placement in higher or lower level hierarchy. i ii. Apply the disjoint and overlapping constraints. Consider a weak entity and try identifying it with an identifying entity. Apply the constraints of Generalization with user-defined and condition- defined constraints. b) Convert the following E-R diagram to relational schema han Employees Degends Note: Dependents is a Wesk Entity and Policy is the Weak Relationship