10. In event mode graphics, a trigger generates an whose is put into an event queue. 11. In order to produce continuously rotating geometry, we have learned to send the vertices to the GPU once and then continuously update the modelview matrix as a uniform. Why is this better than simply rotating the geometry in the javascript application (CPU)? 12. What is the purpose of double buffering? What are the names of these buffers? 13. Given t=1/2 in the interval [0,1], what is the corresponding (ratio preserving) u in the interval [1,3]? 14. Suppose you have created a canvas with coordinates (0,0) to (100,100). A mouse click returns window coordinates (25,25). What are the corresponding clip coordinates? Make a sketch. 15. Give the parametric equation for the line l(t) through the two points p and q, so that l(0)=p and l(1)=q 16. Given points pi,i=1,2,3, is p=0.5p1+0.25p2+0.25p3 a barycentric combination? Why? 17. Sketch and label a triangle with vertices p1,p2,p3. Let p=up1+vp2+wp3. Sketch the point p with barycentric coordinates (1/2,0,1/2)