J2EE Arch assignment isnt so clear showing the domain model

hello
i have downloaded the assingmnet and while i was going throught it i noticed that in the domain model there are two classes that appearantly have an association class that links to the relationship between the classes but as i know association classes should link to association between the other two classes throught a dashed arrow , but that is not the case in the daiagram that is shown in the domain model daigram in the assignment as they show it using an association line and not a dashed one . so what do you think

please i need your help as time goes by quickly

the assignments are unclear/incomplete on purpose. That is to reflect that in real world projets you will never get absolutely clear, flawless requirements.
You just have to make to most of what you are given. Make changes if you think it is appropriate,make assumptions and all but the golden rule is document/expain everything.
That is really all I can tell you, it took me while to make sense of my assignment.
Good luck

ok .. got your point and i think you are right .
thank you