i need help for the three questions

When the Ag+concentration is 3.44104M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 1.773V. What is the Mn2+ concentration? 2Ag+(aq)+Mn(s)2Ag(s)+Mn2+(aq) [Mn2+]=M When the Hg2+ concentration is 1.49M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 2.583V. What is the Al3+ concentration? 3Hg2+(aq)+2Al(s)3Hg(l)+2Al3+(aq)[Al3+]= When the Ag+concentration is 1.28M, the observed cell potential at 298K for an electrochemical cell with the following reaction is 1.606V. What is the Cr3+ concentration? 3Ag+(aq)+Cr(s)3Ag(s)+Cr3+(aq)[Cr3+]=