Write the $IUPAC$ names of the following coordination compounds:
$(a)$ $[Pt(NH_3)_2Cl(NO_2)]$
$(b)$ $K_3[Cr(C_2O_4)_3]$
$(c)$ $[CoCl_2(en)_2]Cl$
$(d)$ $[Co(NH_3)_5(CO_3)]Cl$
$(e)$ $Hg[Co(SCN)_4]$

(N/A) Diamminechloridonitrito-$N$-platinum$(II)$
$(b)$ Potassium trioxalatochromate$(III)$
$(c)$ Dichloridobis(ethane-$1,2$-diamine)cobalt$(III)$ chloride
$(d)$ Pentaamminecarbonatocobalt$(III)$ chloride
$(e)$ Mercury$(II)$ tetrathiocyanato-$S$-cobaltate$(III)$