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Question: please help with part a and b for question 3...

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Please help with part a and b for question 3!
(3) (a) Find the order of all the elements in (Z7, +7) (b) Let ) p be a prime number. Find the oder of all the elements in (Zp, +p (Hint: recall from Math 109 that if g.c.d.(a, )1, then we have the following: a|mn for some m E Z if and only if am.)
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