Which of the following are disadvantages of structured programming design? Choose all that apply. It requires a clear understanding of the problem and the logic required to solve that problem
because it is difficult to make changes to the process.
It typically only shares procedures within the code.
It may be difficult to change if the problem definition or top-level logic changes significantly.
It is time consuming because it requires common procedures that exist independently of the code.

The width of a piece of rectangular land is 5m shorter rhan 1/3 of its length .find the width of the land if the length is 60m,150m.

Which cultural aspect does this type of song best portray? a german polka dance

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)?