Answer all please :)

Which is true of the electrodes in the following reaction? 3Ag+(aq)+Al(s)3Ag(s)+Al3+(aq) There is no change to the mass of the electrodes Ag(s) gains mass, Al(s) loses mass both gain mass Ag(s) loses mass, Al(s) gains mass both lose mass The standard reduction potentials for zinc and silver are Ag+(aq)+eAg(s)EO=+0.80VZn2+(aq)+2eZn(s)EO=0.76V Determine the cell potential that is described by the following line notation. Zn(s)Zn2+(aq)Ag+(aq)Ag(s)0.04V1.56V+0.04V+1.56V The standard reduction potentials for two half-cells involving iron are given below. Fe3+(aq)+eFe2+(aq)Fe2+(aq)+2eFe(s)E0=+0.77VE=0.44V If these two half-cells are connected, which of the following represents the correct overall redox reaction equation and cell potential? ErO(cell)=+1.21VErO(cell)=0.33VEO(cell)=0.33VErO(cell)=+1.21V