Need help creating a rule between quiz and userpoints modules

I've never posted to the paid services forum before so please excuse any noobness.

A site I've nearly completed uses the quiz and userpoints modules so that users take quizzes and receive a userpoint for each correct answer. That part works fine but I don't want the userpoints to just be granted to the quiz taker, what I want to achieve is to have the same number of userpoints deducted from the author of the quiz - i.e. the quiz creator 'pays' the points to the users who answer their questions correctly.

I'm thinking this is something that might be achieved using 'Rules' - as both these modules integrate with rules - but my experience with drupal (and especially Rules) is limited here and I need to get this sorted asap.