150 mL of a solution contiains .00015 M NaI, .0055 M NaC, and .12 M Na3PO4. A solution of .10 M AgNo3 is slowly added. Who precipitates 1st, 2nd, and 3rd?

When the last one to precipitate just begins to precipitate, what % of the other 2 anions are still remaining in solution?

See your post above.