For each metal complex, give the coordination number for the metal species

For each metal complex, give the coordination number for the metal species.

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Concepts and reason
Metal complexes are coordination compounds that retain their properties when dissolved in water. All metal complexes consist of the central metal and ligands.

Fundamentals
Coordination Number (CN):
The coordination number is defined as the total number of dative bonds or coordinate bonds that are linked between a central metal atom or ion and ligands.

Consider a metal complex as shown below:
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Answer:

(a)
The structure of the metal complex is as follows:
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The coordination number = 6.

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(b)
The structure of the metal complex is as follows:
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The coordination number = 6.

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( c)
The structure of the metal complex is as follows:
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The coordination number = 4.

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