Groups and FieldsChallengeHomomorphisms and Isomorphisms ShareHomomorphisms and Isomorphisms · Challenge problemAut(Z30)\operatorname{Aut}(\mathbb Z_{30})Aut(Z30) has order φ(30)=8\varphi(30) = 8φ(30)=8. How many of its 888 automorphisms φ\varphiφ satisfy φ∘φ=id\varphi\circ\varphi = \operatorname{id}φ∘φ=id?Check Show answer Walk through it step by step Practice more like this Review this concept