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The following 2-table database assigns trucks to warehouses. A warehouse can have many trucks, but a truck is assigned to only one warehouse. WAREHOUSE (WAREHOUSE#, WAREHOUSE-SIZE) TRUCK (TRUCK#, TRUCK-DESCRIPTION, TRUCK-MODEL, WAREHOUSE#*) 11. (2 pts) Referring to these fields in these tables, what is the entity integrity rule and how is it applied to this database? 12. (2 pts) Referring to these fields in these tables, what is the referential integrity rule and how is it applied to this database? 13. (2 pts) Referring to these fields in these tables, explain how referential integrity would be enforced in this database