chemistry help

fuel cells:
how do i work out which is the strongest reducing/oxidising agent out of the speicies in the equation with the most positive/negative electropotential in an electrochemical series?

Is there any data or an equation given?

i come across it a lot, i dont have one with me but it asks "which is the strongest reducing agent in the table"
and i dont know whether it's the reactant species or the product species of the most postivie electrode

so as an international standard, The voltage in the table is always given as the reduction potential. i.e the energy of reduction.

So for a strong reducing agent (i.e itself is oxidized) do you think the reduction potential should be large ad positive or large and negative?

fuel cells:
how do i work out which is the strongest reducing/oxidising agent out of the speicies in the equation with the most positive/negative electropotential in an electrochemical series?