Question: Problem 4. [20 Marks] Prove the following statements. (i) Let a, b, c be integers such that c | a and c | b. For

Problem 4. [20 Marks] Prove the following statements. (i) Let a, b, c be integers such that c | a and c | b. For any integers r and y, it holds that el (za + yb + ab). (fi) For two positive integers a, b define a

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