Jeremy has been asked by his manager to begin drafting a report on last year sales figures when he’s midway through the report a co-worker stops by and asks if Jeremy will help him with a problem she has on her project Jeremy also needs to respond to number of emails before the end of the day he is able to accomplish all these tasks which positive workplace behavior has he demonstrated

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?