Quiz: Point Deductions

Hello Everyone,

I hope you can help me with the setup of a Captivate project I am working on.

I am creating an activity to teach clients how to format a document (bold, center, uppercase, etc.). I create these buttons for them to click on. For example: I have three buttons - Bold, Italic, and Underline. When they click on the Bold button, they'd receive 1 point. All points earned are populated on the Quiz Results page at the end of the project. However, I do not seem to figure out to set up to deduct some point if they click on the wrong button (Italic or/and Underline). Any idea?

I'd also like those wrong clicks to be accumulated as well. For example, if they click on the Italic button and Underline button, two points should be deducted (given each click is worth 1 point). Any idea?

If I am not explaining myself well, please let me know.

Thanks!