What is the two-dimensional coordination number of a molecule in square close-packed layer?

What is the two dimensional coordination number of a molecule in (i) square close-packed layer (ii) hexagonal close-packed layer.

What is the two dimensional co-ordination number of a molecule in A square packed layer ?

What is the two dimensional coordination number of a molecule in a hexagonal packed layer.

What is the 2 D coordination number of a molecule in square close packed layer?

What is the coordination number of atoms: In a cubic close-packed lattice?

What is the coordination number of an atom in two dimensional square close packing(scp)?