1) Show that A_4 ( the group of even permutations on 4 letters) is a semi direct product: A_4 =~ (C_2 x C_2) ⋊φ C_3
2) Describe explicitly the associated φ : C_3 --> Aut(C_2 x C_2)
Here is my sketch:
First I am going to find the permutations of A_4. I think there are 12 elements of permutation in A_4 then find all the homomorphisms of (C_2 x C_2) ⋊φ C_3
But I dont know if this is the right way to do this question. Can any body help please?
Thank you in advance