i need help for the three questions

Write the cell notation for an electrochemical cell consisting of an anode where Cr (s) is oxidized to Cr3+(aq) and a cathode where Fe3+(aq) is reduced to Fe2+(aq) at a platinum electrode. Assume all aqueous solutions have a concentration of 1mol/L and gases have a pressure of 1 bar. Write the cell notation for an electrochemical cell consisting of an anode where Mg (s) is oxidized to Mg2+(aq) and a cathode where Mn2+(aq) is reduced to Mn (s) . Assume all aqueous solutions have a concentration of 1mol/L. Write the cell notation for an electrochemical cell consisting of an anode where Cr (s) is oxidized to Cr3+(aq) and a cathode where Sn2+(aq) is reduced to Sn (s). Assume all aqueous solutions have a concentration of 1mol/L