Specify and execute the following queries for the database in Exercise 5.16 using the RA interpreter. a. Retrieve the names of students who have enrolled in a course that uses a textbook published by Addison-Wesley-Longman. b. Retrieve the names of courses in which the textbook has been changed at least once. c. Retrieve the names of departments that adopt textbooks published by Addison-Wesley only. d. Retrieve the names of departments that adopt textbooks written by Navathe and published by Addison-Wesley. e. Retrieve the names of students who have never used a book (in a course) written by Navathe and published by Addison-Wesley

David is in week 3 of his current ashford course and has a paper due by monday night at midnight. he has finished everything but the concluding paragraph. as he boots up his computer to work on it, he sees a flash across the screen and then the screen goes black. he begins to panic as he tries desperately to turn the laptop back on. david should have saved his work on what kind of portable device?

Technician a says that a dry sump system uses no oil storage sump under the engine. technician b says that a wet sump system uses no oil storage sump under the engine. who is correct?

Assume the existence of a bankaccount class. define a derived class, savingsaccount that contains two instance variables: the first a double, named interestrate, and the second an integer named interesttype. the value of the interesttype variable can be 1 for simple interest and 2 for compound interest. there is also a constructor that accepts two parameters: a double that is used to initialize the interestrate variable, and a string that you may assume will contain either "simple", or "compound", and which should be used to initialize the interesttype variable appropriately. there should also be a pair of functions getinterestrate and getinteresttype that return the values of the corresponding data members (as double and int respectively).