I understand that I can moderate a quiz to give additional attempts. My question is, do those extra attempts stack with any unused attempts that were originally available to the student? For example, suppose I originally allowed 3 attempts, but student "Joe" used only 2 attempts before the "Available Until" date/time. Now, suppose I moderate the quiz to grant 3 additional attempts for everyone in the class, and I check the box to "Manually unlock the quiz for the next attempt." Will Joe now get 4 more attempts (the 1 he didn't use originally plus the additional 3), or just the additional 3?