I really need help with this. If anyone could guide me, please let me know. - Sincerely, thank You

Ok. We don't do your homework for you. Do you understand C++ passing function arguments by value vs. passing them by reference? If not, let's start there. If you do, tell me what YOU think they mean (with illustration code), so if you are falling into the deep end I might be able to help you get back to shore! :-)