Database System SQL Query

EXERCISE 4 . Ri (A, B, C ) , with IR, l = 100 constratin between C and R .R2 ( D, E, F);with Ral= 200 1 . PROJ A, B (RI) 2. PROj F (R2) 3. PROJ B, c (R) 4. PROJ G(K) 5. R1 JOINA-DR2 6. R1 JOINc-DR2 7. R3 JOIN AR and a referential integrity and a referential integrity constratin between F and R R3 (G, H, 1 ) , with 1Bel=50 Find the cardinality of the following expressions 9. (R3 JOIN-AR) JOIN c-ER2