Precipitate Chemistry

A solution contains 1.0 x 10##^{-4}## M Cu##^+## and 2.0 x 10##^{-3}## M Pb##^{2+}##. When I##^{-}## is added, which will precipitate first? How much I##^-## is needed to cause a precipitate to form?When CuI is added to PbI##_2##
CuI K##_{sp}## = 5.3 x 10##^{-12}##
PbI##_2## K##_{sp}## = 1.4 x 10##^{-8}##