Question 1: A student is planning a polygon mesh data structure in which vertices are stored in a vertex array, and then the triangular faces in the mesh each store the indices of the vertices and the triangle's face plane normal vector. The face data structure is given below. class Triangle { int vertices[3]; il The vertex indices. float nx, ny, nz; // The face-plane normal. }; a. Is this a convenient way to represent a mesh if used with flat shading? Explain your reasoning. (2 points) b. Suggest an object for which this is a good mesh format when used with Gouraud shading. Explain. (2 points) c. Suggest an object for which this is a bad mesh format when used with Gouraud shading? Explain. (2 points)