Q1- Answer with true or false: [15 points] 1. ( ) In tuple relational Calculus: (x)(P(x))(x)(P(x)) 2. ( ) We cannot infer a functional dependency automatically from a particular relation state. 3. ( ) The ER diagram is an example of the conceptual data model. 4. ( ) In the relational model the delete operation can violate entity integrity constraint. 5. ( ) In SQL, the schema can be changed using the "update" operation. 6. ( ) The JOIN operation can be specified as a CARTESIAN PRODUCT operation followed by a PROJECT operation. 7. ( ) Any retrieval query that can be specified in basic relational algebra can also be specified in relational calculus. 8. ( ) In SQL, the view is realized or materialized at the time of view definition. 9. ( ) Views defined using aggregate functions are updatable. 10. ( ) Specialization lattice may contain multiple inheritance. 11. ( ) In the following EER diagram, every OWNER entity inherits all the attribute of both CORPORATION and PERSON Consider the following EER diagram and answer the following questions with true or false. 12. ( ) Tuple X can exist in both E and E1 13. ( Tuple Y can exist in both El and E 1 14. ( ) Tuple Z exists in E but does not exist neither in E1 nor in E2 15. ( ) E has a relationship R with E3