Suppose relation R(A,B,C) has the tuples: 0 1 2 0 1 3 4 5 6 Compute the bag union of the following three expressions, each of which is the bag projection of a grouping () operation 2.Tx(yB.SUM(C)--X 3Tx(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. a) 3 appears exactly four times b) 3 appears exactly three times. c) 3 appears exactly once. d) 6 appears exactly once