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Problem 4.4, [5 points]. Find all squares and generators of Z 13. Show your work. Problem 4.5, [5 points]. Compute the last decimal digit of

Problem 4.4, [5 points]. Find all squares and generators of Z

13. Show your

work.

Problem 4.5, [5 points]. Compute the last decimal digit of 71000 (by hand).

Show your work.

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