If you need some help with this graph - think about 1)what are your reactants - if you have them, then you can make ATP - you need ADP + P plus a source of energy (something oxidizeable). 2) If you inhibit part of the ETC, then you reduce the amount of H+ ions, and so what will happen to the amount of ATP produced?
Now draw your graph of ATP production at each of the three pts - when you have ADP + P, when you add succinate, and finally, when you add cyanide. Now repeat the thought process, but for oxygen consumption.
