Name the numbered structures:

1 : Epidural space, with adipose tissue and blood vessels

2 : Dorsal root, containing sensory neuron axons

3 : White matter ; more specifically the anterior white column

4 : Gray matter , with the point close to the lateral horn

5 : The pia mater, tight against the spinal cord

What meninx (singular of meninges) is located "deep" with respect to 1 ?

That would be the dura mater, since 1 is the epidural space

What area is located "superficially" with respect to structure 5 ?

This would be the subarachnoid space.