help mee analytical chemistry ksp

(b) Silver nitrate (AgNO3) is slowly added to a solution that contains Cl' and Br ions with the concentration of 0.02 M respectively. Without calculation predict the ion that will precipitate first as silver compound. Explain your choice. Ksp AgCl = 1.6 x 10-0, Ksp AgBr = 3.9 x 10-11 (3 Marks) (c) A student in an analytical laboratory wants to prepare CaSO4 precipitate. He adds 15 mL of 0.010 M Na2SO4 to 75 mL of 0.001 M CaCl2 solution? Will precipitate CaSO4 occur? The Ksp of CaSO4 is 4.93 x 10-- (6 Marks)