Hints for IX, 2

(Note:  Full solution at the end of the quiz, in two weeks.)

Question 4 Hint:  None of these are capitol cities, right?
   
Question 5 Hint: Is there something in "Overheard" that cannot be overheard?
   
Question 6 Hint: What do we know about these superheroes...?

(Rollover to reveal hints.)