Database systems

Find min and max cardinality for the following queries EXERCISE R1 (A, B, C), with foreign integrity constraint between C and R2, and having cardinality CI = 200 R2(D, E, F), , with foreign integrity constraint between E, F and R3, and having cardinality C2 500 R3(G, H, I), having cardinality C3= 100 3. PROJ B, c (RI) 4. R1 JOIN c-DR2 7. PROJ AB (RI) 8 (R JOIN C's D R2) JOIN E = G R3