Q3 any group G of order 15 is cyclic (Q4) Find a composition series for Z36 (Q5) Let G be a group and H < G. Prove that HG iff the operation aHbH = abH is well-defined Prove Aut(G) is none trivial (Q6) Find all group homomorphisms from Z3 Z4 to Z6 Q7 Let G be a group such that a = e for all a G. Prove Aut(G) is none trivial