Indicate the coordination number for the central metal atom in each of the following coordination compounds:
(a) [Pt(H2O)2Br2]
(b) [Pt(NH3)(py)(Cl)(Br)] (py = pyridine, C5H5N)
(c) [Zn(NH3)2Cl2]
(d) [Zn(NH3)(py)(Cl)(Br)]
(e) [Ni(H2O)4Cl2]
(f) [Fe(en)2(CN)2]+ (en = ethylenediamine, C2H8N2)