1 - Ask your questions on Virtual Office Hours. I check it regularly, and you can talk
among yourselves there.
Virtual Office Hours
2 - there's a tutoring lab staffed with assistants who may be able to help you with homework assignments and questions. Business buildling, Room 251.
3 - companion website http://cw.prenhall.com/bookbind/pubbooks/deitel5/ maintained by the publisher of the textbook.