button status change after test

I have a project with the following parts:
3 buttons, one visible and 2 disabled
2 question banks.
After passing the first question bank with more than 50 points, I need to make a trigger that changes the state of button 2 to normal when returning from the questions.

link to see the project

https://360.articulate.com/review/content/efddb15c-da92-4cd1-a242-aa3e92b9e4c9/review 

Thanks for your help beforehand

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