Write the IUPAC name of the following :
(i) `[Co(NH_(3))_(6)]Cl_(3)`
(ii) `[NiCl_(4)]^(2-)`
(iii) `K_(3)[Fe(CN)_(6)]`

Explanation

To write the IUPAC names of the given complexes, we will follow a systematic approach for each complex. Let's break it down step by step.

### (i) `[Co(NH3)6]Cl3`

1. **Identify the ligands and their count**: The complex contains six amine ligands (NH3). The prefix for six is "hexa".

2. **Identify the central metal**: The central metal is cobalt (Co).

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