Answer :

(i) From the figure it is observed that EF is the intersection between faces EFGH and EFBA.


The edge EF is highlighted in figure:



(ii) From the figure it is observed that faces EFBA and FBCG intersect at edge FB.


Faces are highlighted in the given figure:



(iii) The three faces which form the vertex A are ABFE, ABCD and ADHE.


Faces are highlighted in the given figure:



(iv) Vertex D is formed by the faces ABCD, ADHE and CDHG.


D is highlighted in given figure:



(v) The edges which are parallel to edge AB are:


CD, EF and HG.


The edges are highlighted in given figure:



(vi) The edges that are neither parallel nor perpendicular to edge BC are AE, EF, GH and HD.


The edges are highlighted in given figure:



(vii) The edges that are perpendicular to edge AB are as follows AE, BF, AD and BC.


The edges are highlighted in given figure:



(viii) A, B, G and H are four vertices that do not all lie in one plane.


The vertices are highlighted in given figure:



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