Question: Cryptography and network security Task: 1 - Show whether the set divides x is abelian group under addition. 2 - Show whether the set divides

Cryptography and network security Task:
1- Show whether the set divides x is abelian group under addition.
2- Show whether the set divides x is abelian group under multiplication.
Submitted materials:
Each group has to submit a handwritten answer showing the output of each step, in details.
Cryptography and network security Task: 1- Show whether the set divides

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