There were no model answers in this module. That was intentional.
A model answer would have let you read rather than think. It would have let you compare rather than create. And comparison is the enemy of the skill you are trying to build, because in real product work, there is no model answer to compare yourself to. There is only the problem, the user, the business context, and your ability to translate all of it into a document that a team can build from with confidence.
What you should do now:
The gap between your first draft and a great PRD is not talent. It is practice, feedback, and the willingness to rewrite. You now have the framework. The rest is repetition.