Q. 92

If I play a cleric up to the point where I can cast 4th level divine spells and then take a level of Nar Demonbinder, can I use Nar Demonbinder's spells to qualify for other prestige classes that require 4th or 5th level arcane spells? On a similar question: Mystic Theurge requires 2nd level divine AND 2nd level arcane spells - does this requirement mean I cannot use Demonbinder to qualify for it (since I can't cast 2nd level arcane spells, only 4th and up)?