a. Given a frequent item-set {P, Q, R, S}, list down all the possible association rules you can generate.

b. Refer to the following table for the various transactions:

Transaction Id	List of items
1	U,V,Y
2	V,X
3	V,W
4	U,V,X
5	U,W
6	V,W
7	U,W
8	U,V,W,Y
9	U,V,W

Given the frequent item-set {U, V, Y}, what association rules have minimum support count = 2 and minimum confidence = 50%. List down all those rules.