3.11 Write the following queries in SQL, using the university schema. a. Find the names of all students who have taken at least one Comp. Sci. course; make sure there are no duplicate names in the result. b. Find the IDs and names of all students who have not taken any course offering before Spring 2009. c. For each department, find the maximum salary of instructors in that department. You may assume that every department has at least one instructor. d. Find the lowest, across all departments, of the per-department maximum salary computed by the preceding query.

1. web and mobile applications allow users to be actively engaged in an online activity. a true b false 2. some examples of business applications purposes are to collaborate, share files, meet virtually in real-time, and accept payments. a true b false 3. an education application would most likely do which of the following? a allow users to watch popular movies and tv shows b connect users with social and business contacts c confirm users' travel plans d teach users a new language 4. a uniform resource locator (url) is how the internet knows where to take users when an address is typed into a browser. a true b false 5. deon is required to provide the citation information for his sources. what type of information should he collect from his sources? a author name, title, date of publication, date of access, url b connections to background information c interesting facts and statistics d notes on important information