“Susan, let’s not get upset about this. It doesn’t matter if the paper is blue or yellow. Let’s just have Michael decide; it’s part of his job assignment.” Which group role does the statement above reflect?
a.
Leadership
b.
Social
c.
Task
d.
Individual

Please select the best answer from the choices provided

A
B
C
D

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)?