1) PbBr₂; 9.04 x 10¯²⁹

2) ZnS; 2.93 x 10¯²⁵

3) Cd₃(PO₄)₂; 2.53 x 10¯³³

The values given are the K_sp values from a reference source. Due to rounding, the K_sp value you calculate will be slightly different, but it should be close.