a) For the half reaction: Pb4+(aq)+2e- = Pb^2+ compute the cell voltage E, at 25C if the concentration of Pb^4+ is 0.5M and that of Pb^2+ is 0.1M b) Evaluate delta G (in kJ) for the reaction Cd+Pb^2+=Cd^2+ + Pb Potential, E, of the cell is measured at 0.29V