The oxidation number of nickel in $K_4[Ni(CN)_4]$ is

Write the formulas for the following coordination compounds:
$(a)$ Tetraammineaquachloridocobalt $(III)$ chloride
$(b)$ Potassium tetrahydroxidozincate $(II)$
$(c)$ Potassium trioxalatoaluminate $(III)$
$(d)$ Dichloridobis(ethane$-1,2-$diamine)cobalt $(III)$
$(e)$ Tetracarbonylnickel $(0)$

Identify the formula of the coordination complex $Bis(\text{ethylenediamine})dithiocyanatoplatinum(IV)$.

State the $IUPAC$ name of the following complex: $K_{3}[Fe(CN)_{5}(NO)] \cdot 2 H_{2}O$

The proper name for $K_2[PtCl_6]$ is

The $IUPAC$ name of $[Co(NH_3)_3(H_2O)_2Cl_2]$ is: