In the figure of cube.
(i) Which edge is the intersection of faces EFGH and EFBA?
(ii) Which faces intersect at edge FB?
(iii) Which three faces form the vertex A?
(iv) Which vertex is formed by the faces ABCD, ADHE and CDHG?
(v) Give all the eges that are parallel to edge AB.
(vi) Give the eges that are neither parallel nor perpendicular to edge BC.
(vii) Give all the edges that are perpendicular to edge AB.
(viii) Give four vertices that do not all lie in one plane.