In three to five sentences, describe how good e-mail work habits increase workplace efficiency and productivity.

Implement the dining philosophers problem (described on pages 167-170 in the textbook (chapter 2.5. create a graphical user interface - showing which philosopher is eating, and which is waiting/thinking at any given time. show the forks. use java programming language for this project.

Octothorpe is another name for what common computer keyboard symbol?

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)?