6. Suppose relation R(A,B,C) has the tuples: ABC 012 0 13 Compute the bag union of the following three expressions, each of which is the bag projection of a grouping (V). operation: 1. Tx(YA,B, MAX(C)-x(R)) 2. Tx(YB,SUM(C) X(R)) 3. Tx(YA,MIN(B)--X(R)) Demonstrate that you have computed this bag correctly by identifying, from the list below, the correct count of occurrences for one of the elements. oa) 3 appears exactly twice. Ob) 1 appears exactly twice. O c) 6 appears exactly twice. d) 5 appears exactly once