Consider a H$2-$O$2$ fuel cell running on pure reactants, at atmospheric pressure, and at $25$oC$.$ The following data are obtained while running the fuel cell on a very small loads: Voltage, $($V$)$ Measured Current, i $($A$/$cm$2)0\mathrm{.}8570\mathrm{.}0030\mathrm{.}8240\mathrm{.}010\mathrm{.}8020\mathrm{.}0180\mathrm{.}7980\mathrm{.}0220\mathrm{.}7910\mathrm{.}025$ a$.$ Calculate the Tafel slope $($b$),$ transfer coefficient $($a$),$ the exchange current density $($i$0),$ and the Tafel eq$.$ intercept $($a$).($Assume the activation loss on the anode is negligible; i$.$e$.$ the parameters calculated are for the rxn on the cathode$).$ b$.$ If the fuel cell is to be run at $0\mathrm{.}25$ A$/$cm$2,$ calculate the voltage that is sacrificed to overcome the activation barrier associated with the electrochemical rxn$.$