Each part below describes a stage or a process in the standard OpenGL rendering pipeline. Your answer is to name the pipeline stage or process a For a single geometric primitive determines the pixels that are covered by the primitive b Subdivides shapes more complex than primitives into standard primitive shapes c For a single vertex does some processing and outputs a vertex to the later stages d Takes one or more vertices and creates a geometric primitive from them e. For a single pixel, does some processing and outputs a color for that pixel