Redox Potentials and Free Energy Change Questions

Please help me with these questions, I have been trying them for a really long time and I have no idea how to figure them out.  Thank you!

The half reactions for a newly discovered electron transport chain in an alien species are given in the Table.  From their E0’ values what would you guess is their order in the chain?  What would you need to know before you were more certain of their order.
Table: Standard redox potentials for electron carriers in the alien respiratory chain
Half reaction                                                                                   E0’ (V)
Boba Fett Ubiquinone  + 2 H+ +  2e- → Boba Fett ubiquinol                    0.027
Cytochrome Zaphod (Fe3+) + e-   → cytochrome Zaphod (Fe2+)       0.085
Cytochrome Audrey II (Fe3+) + e-   → cytochrome Audrey II (Fe2+)   0.33
Cytochrome ALF (Fe3+) + e-   → cytochrome ALF (Fe2+)                   0.37
Cytochrome Na’Vi (Fe3+) + e-   → cytochrome Na’vi (Fe2+)                   0.40



The relationship of free energy change (ΔG) to the concentrations of reactants and products is important because it predicts the direction of spontaneous chemical reactions.  Familiarity with this relationship is essential for understanding energy conversions in cells.  Consider for example the hydrolysis of ATP to ADP and inorganic phosphate (Pi):
ATP + H20 → ADP + Pi
The free energy change due to ATP hydrolysis is
 ΔG = ΔGo + RT ln [ADP] [Pi]
                                 [ATP]

       = ΔGo + 2.3 RT log [ADP] [Pi]
                                          [ATP]

Calculate the ΔG for ATP hydrolysis when the concentration of ATP, ADP and Pi are all equal to 1mM.  What is ΔG when the concentration of ATP, ADP, and Pi   are all equal to 3M?