Hi Andrew, this is a forum for general student support - not for specific problems within a course. However, I have looked at the DAP quiz in the PLC FOR INSTRUMENTATION course and I can see you have not actually submitted your Quiz answers. Unless you complete the submission you will be unable to access any of the other sections in your course. Pick "continue my attempt" and then submit your attempt.
If your issue is that you can't find an answer to a question in the Quiz please contact the course lecturer for assistance. When you first log in the "My courses" section will list who the lecturer(s) for the course are and you can message them by picking on one of their names and pressing the [Send a message] button.