I'm having problems with the system . Every Answer for the chapters said my answer is wrong when I checked from the system and from the book both have the correct answer, but every time when I typed the correct answer the system said I have the wrong answer. I'm answering straight from the text, but it's telling my answer is incorrect. Also, the system isn't telling me whats the correct answer. What I can do to fix that, because I don't want to my score be reduce for this issue.