a) Briefly explain the idea behind Cohen-Sutherland algorithm. b) Briefly explain the components of Phong Illumination model. c) Pick the below choice and explain your selection briefly. The locations of the vertices is the vertices and edges. .......... and .............. is the organization of is the same even if changes. i. ii. geometry, topology, topology, geometry topology, geometry, topology, geometry geometry, topology, geometry topology, topology, topology, geometry, geometry iii. iv