In what order will the keys in the binary search tree above be visited in a preorder traversal?  Provide the sequence as a comma separated list of numbers.  For example, if I has instead asked you to provide the keys along the rightmost branch, you would type in your answer as 50,75,88.

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In what order will the keys in the binary search tree above be visited in a preorder traversal?  Provide the sequence as a comma separated list of numbers.  For example, if I has instead asked you to provide the keys along the rightmost branch, you would type in your answer as 50,75,88.

20
28
37
50
57
62
75
68
88
Transcribed Image Text:20 28 37 50 57 62 75 68 88
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