The textbook presents four different world representation division schemes. For each of the following statements, circle the abbreviation of the division scheme that the statement best applies to. The abbreviations are: TG = Tile graph, DD = Dirichlet domains, PV = Points of visibility, and NM = Navigation mesh. a. According to the textbook, used by a majority of modern games. TG DD PV NM b. Level partitioned into regions based on closest pre-positioned node. TG DD PV NM c. Nodes placed at (or near) convex vertices. TG DD PV NM d. Nodes placed at geometric centroids of level's floor" polygons. TG DD PV NM e. Resulting pathfinding graph can be large and dense. TG DD PV NM f. Can produce blocky" or "jaggy paths, unless smoothed. TG DD PV NM g. Has multiple other uses, e.g., finding "safe routes. TG DD PV NM h. Level partitioned into regular grid, often squares. TG DD PV NM