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4. Suppose a B+ tree with 4 levels having exactly 7 keys in each node. There is a record for each key 1, 2, .

4. Suppose a B+ tree with 4 levels having exactly 7 keys in each node. There is a record for each key 1, 2, . . . , k ? 1, k where k is the number of data records. How many nodes should be examined to find records with keys in the range [82, 113]?

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