Which one is a Homoleptic complex?

An example of a double salt is:

The number of water molecule$(s)$ directly bonded to the metal centre in $CuSO_4 \cdot 5 H_2 O$ is

In $K_4[Fe(CN)_6]$,which of the following statements is correct regarding the bonding?

An aqueous solution of $1 \ mol$ of the coordination compound $[Co(NH_3)_5Cl_3]$ gives $3 \ mol$ of ions. If $1 \ mol$ of the same compound reacts with $2 \ mol$ of $AgNO_3$ to produce $2 \ mol$ of $AgCl_{(s)}$,what is the correct formula of the coordination compound?

Which of the following sets of ligands does $NOT$ contain an ambident ligand?