Let A = {a,b,c,d} and B = {y,z}. Find:

a) A X B = {(a,y),(a,z),(b,y),(b,z),(c,y),(c,z),(d,y),(d,z)}

b) B X A = {(y,a),(y,b),(y,c),(y,d),(z,a),(z,b),(z,c),(z,d)}

*Note that A X B &ne B X A