2. Suppose relations RAB) and S(BCD) have the tuples shown below: BCD 2 46 A B 564 79 Compute the result of the join query SELECT A, R.B, C, D FROM R, S WHERE RB = S,B Then, identify which of the following tuples is in the result O a) (3,4,7.8) b) (1.2.4.6) c) (1.2.6.8) d) (5,6,7.8) 3. Suppose relations R(AB) and S(B.C,D) have the tuples shown below: A B BCD Compute the result of the join query SELECT A, R.B, S.B, C, D FROM R, S WHERE R.AKS.C AND R.B S.D Then, identify one of the tuples in the result from the list below O a) (1,2.4.6,8) b) (3,4,5,7,9) O c) (5,6,4,6,9) O d) (3,4,4,7,8)