Find(a) [Z24 : ⟨8⟩] and the number of right cosets of ⟨8⟩ in Z24.(b) [U(8) : ⟨3⟩] and the number of right cosets of ⟨3⟩ in U(8).(c) [Z : 4Z] and the number of right cosets of 4Z in Z

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