Ksp and Molar Solubility Comparison

Of the compounds $BaSO_4$ ($K_{sp} = 1.1 \times 10^{-10}$), $CaCO_3$ ($K_{sp} = 4.8 \times 10^{-9}$), and $PbI_2$ ($K_{sp} = 7.9 \times 10^{-9}$), which has the highest molar solubility in water?