5.  What are Fides qua and Fides quae?

Already answered here.

Fides qua is the personal adherence; the belief that you have; the fact that you cling to Him.  Fides quae is the assent to the whole Truth which God has revealed — it is the “stuff” of faith; the content of your faith; “what” you believe.  The Creed symbolizes the fides quae.