3. Read about the two functions (empty-scene w-size y-size) and (place-image 15 object 2-coord y-coord scene). Try them out: > (place-image (rnd-triangle 50) 100 100 (empty-scene 200 200)) > (place-image (rnd-triangle 100) 150 150 (place-image (rnd-triangle 50) 100 100 (empty-scene 200 200))) Now, write a recursive function (rnd-pic n size) which creates a scene that is size pixels wide and size pixels high, and places n random triangles at random positions on this scene: 3. Read about the two functions (empty-scene w-size y-size) and (place-image 15 object 2-coord y-coord scene). Try them out: > (place-image (rnd-triangle 50) 100 100 (empty-scene 200 200)) > (place-image (rnd-triangle 100) 150 150 (place-image (rnd-triangle 50) 100 100 (empty-scene 200 200))) Now, write a recursive function (rnd-pic n size) which creates a scene that is size pixels wide and size pixels high, and places n random triangles at random positions on this scene