Question: In the merge-sort tree shown in Figures 12.2 through 12.4, some edges are drawn as arrows. What is the meaning of a downward arrow? How

In the merge-sort tree shown in Figures 12.2 through 12.4, some edges are drawn as arrows. What is the meaning of a downward arrow? How about an upward arrow?

Figures 12.2

85 24 45 17 31 96 50 17 31 96 50 85 24 45 (a) (b) 17 31 96 50 17 31 96 50 63 45 63 45 85 24 24 (c) (d) 17 31 96 50 17 31

Figures 12.4

17 31 50 63 (0) (p) nou

85 24 45 17 31 96 50 17 31 96 50 85 24 45 (a) (b) 17 31 96 50 17 31 96 50 63 45 63 45 85 24 24 (c) (d) 17 31 96 50 17 31 96 50 63 45 63 45 24 85 24) (e) (f) 08 17 31 50 63 (0) (p) nou

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