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D Question 5 1 pts Let m, n be two integers. For each of the statements below, decide if it is TRUE or FALSE: (a) If 91mn, then 9/m or 9. [ Select ] (b) If 19|mn, then 19/m or 19. [ Select ] (c) If 19|mn, then 19/m and 19. [ Select ] D Question 6 1 pts Consider a function f : N X N - N given by f(x, y) = 3*7%. For what natural n, 21 . 5"-3 is in the image of f? Enter the numerical value. D Question 7 1 pts To justify your answer for Question 6, which of the facts below should you use? The triangle inequality. Cantor's Theorem. AGM O the FTA O Euclid's lemma