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Let ? = 〈?, ?|? 4 = ? 6 = ?, ?? = ??〉. Let ?:...

Let ? = 〈?, ?|? 4 = ? 6 = ?, ?? = ??〉. Let ?: ℤ4 × ℤ6 → ? by ?(c,d) = ? c? d for all c ∈ {0,1,2,3} and d∈ {0, 1, 2, 3, 4, 5}.

prove that ? is a homomorphism and if ? is an isomorphism

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