This table shows the prizes a teacher had in the box. ​ Prize​ Number in the Box​ ​Bookmark 12 ​Pencil 8 ​Poster ​ 4 ​The teacher will add more prizes to the box. He does not want to change the ratios among the three types of prizes. If he adds 2 more pencils to the box, how many more bookmarks and how many more poster should he add to the box? ​In the space below, show all the steps you used to solve the problem. ​Enter your answers and your work in the space provided.