Ok, now I understand the problem even though I have received my assignment back. While preparing for the exam I found that the question is actually in our prescribe book on page 178-179 question 15, with a difference. The Dessert code for the three entities are DE8, DE5 and DE2. In our assignment they were DE8, DE8 and DE2. This makes a hell of a difference.
What I am realy disgusted about is why the lecturer did not reply on the question that I have asked if the Dessert code did not have a typing error to it. Now I have not done as well as I would like in my assignment and seeing that the marks count towards our final exam mark that puts me even more off.
We are not supposed to contact the lecturer and are advised to use the forum. I have used the forum and no reply from the lecturer/s. What is going on? I am sure the answers are given by the authors of the prescribe book to learing institutions. The assignments are then marked against the answers from the authors.
I await feedback form a lecturer.