A | B | C | D | 12 | 3 | 4 | 6 | 1 | 2 | 7 BB 12 3 B B 23 | 10 Assume we have the two relations R and S as shown above. Answer the following questions: 1. Write the output relation from the following expression (if the relation is empty, then state so): (IIvec (S) Ilv+C (R)) Av=x R 2. Write the output relation from the following expression (if the relation is empty, then state so): Ox = 3 (RMS) 3. Write the output relation from the following expression (if the relation is empty, then state so): OA>1 (IIA + X+B, C R) II(S), 4. Write the output relation from the following expression (if the relation is empty, then state so): R -S 5. Write the output relation from the following expression (if the relation is empty, then state so): R X=Z or C=z) YB, sum(C) As W , min(D) As Z (S)