(1,,1) is an element of external direct product of ZmxZn. 1-Prove or disprove with an argument the following: Is <1,1> isomorphic to Z6, Z9, Z8, Z7? 2- Can you show directly that <1,1> is isomorphic to Z6 using isomorphism only and without going to theorem in Abstract algebra that Zmn~ ZmxZn. 3- Can you show directly that <1,1> is not isomorphic to Z8 using isomorphism only and without going to theorem in Abstract algebra that Zmn~ ZmxZn