CHemical formula names

Question

a. Name either the complex, or given the name of the complex, write the formula for the complex
I. Fe[AlF6]
II. tetracarbonylplatinum(IV) chloride III. [CrBr(H2O)(en)2]Cl2
IV. K3[Fe(CN)6]

I have really no idea how to do this

Answer 1

http://www.chemistry.wustl.edu/~edudev/LabTutorials/naming_coord_comp.html