How can I add extra time to a quiz for one student?

YOU CAN MODERATE A QUIZ FOR ONE SINGLE STUDENT.

Step 1 - Click the quiz name.

Step 2 - Click Moderate Quiz from the tabs that appear on the right side of the screen.

Step 3 - Click the box next to the student that you want to moderate quiz times or attempts.

Step 4 - Click the Edit button and add extra time.

Step 5 - Click SAVE.  

You have now moderated a quiz for a single student.

I was very frustrated until I figured this out.  Hopefully, this explanation is helpful for others.