In the 2D figure below, each edge is a planar face in the triangle with its outward normal shown. You can assume that, if extended, no edge intersects another triangle. [8 marks] a) Build a BSP (Binary Spatial Partition) tree which uses the lines containing the edges to partition the 2-D space, and insert the edges into the tree. b) Which edge would be drawn first if the viewer is at the location marked V? c) Which edge would be drawn last if the viewer is at the location marked V? d) Which edge(s) would be removed with backface culling