86. Solving a chemistry problem

8. Name the following compounds, indicate the CN and the oxidation state of the complexing atom (point "a"), and also write the chemical formulas of the following compounds (point "b").
eight.
a. [Pd(NH2OH)2Cl2], [Co(NH3)5Cl]Cl2, K2[PtI6];
b. rubidium hexakis(thiocyanato)ferrate(III), sulfitotriammineplatinum, chloropentamminiridium(III) chloride;