Fill in question with correct answer if you have previously answered it correctly

I raised another issue here which is similar to this one but is different enough that they should be separate. Only show questions that have not been answered correctly

I'm trying to make quizzes that will automatically fill in correct answers for questions that you have answered correctly previously.

Like the other issue I think that I need to modify the function
function quiz_take_quiz($quiz)

And once again I'm unsure which part of this function I need to change to auto-fill correct answers from previous quiz attempts.

If you need further information, let me know.