10. (16 points) For each of the following questions, circle either T (True) or F (False). a. T F A specialization hierarchy is a result of multiple inheritance in EER models. b. T F The rows of a relation can be interchanged without changing the state of R. C. T F Any candidate key is a superkey. d. T F Any superkey is a key. e. T F Any set of attributes that does not include a primary key cannot be a superkey. f. T F A foreign key is a superkey. R T F A relation in a relational model can only have one key h. T F Delete operation may violate referential integrity constraint but does not violate entity integrity constraint. 11. [10 points) Short answer questions (2 points each): 1. Define entity: voleti ushie Sistem APP thus allows Oweners to rent Properties. turonters 2. Weak entity: 3. Define relation 4. Define relational database schema 5. Define primary key