The image of the D and VP (thoguh I've already done it, I found another document after I was complete--what a shame--that had a similar almost same diagram for the D and VP parts: http://www.math.nus.edu.sg/aslaksen/projects/ykk-urops.pdf
(page 27) 2. Relevant equations
magnification: m = [tex]\frac{d_{i}}{d_{o}}[/tex]

3. The attempt at a solution
I found m: 5.2 (you may check, I used hight to find it, and measuring from the skecth graph) I want to know how to find either [tex]d_{i}[/tex] or [tex]d_{o}[/tex] and which one I should find first.