Requiring multiple variable changes to change the state of a butto

Hello and thank you for any help you can give.

I am working on a course, and I am having trouble with one slide. Hopefully someone can help.

There are several hotspots and each plays an audio track. That works fine.

On most slides, the next button is disabled until the end of the timeline. In this case, however, we want the next button to stay disabled until the user clicks on each of the hotspots. I have created a true/false variable for each hotspot with a default value of false. I have made a trigger for each to change the value to true when clicked.

But I am having trouble with changing the state of the button. I have no idea what order the user will click the hotspots and I am only seeing an option to change the state when one variable changes and then set conditions. However, if that hotspot is not clicked last, it doesn't work.

If you have any suggestions, I would appreciate it.

Thanks you.