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Reduction Through Constant Current Electrolysis

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Reduction through constant current electrolysis
a) How much Cr3+ was reduced to Cr2+?
b) A few seconds after the electrolysis was stopped, the potential of the cell came to rest
at -0.524 volts. How much Cr3+ actually remains in the solution?
c) What was the original Cr3+ concentration?

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Cell: Pt/H2(1 atm)/H+(aq)(1.0 M)/Cr3+(aq)(??? M)/Pt ...

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The reduction through constant current electrolysis is found. The solution contains answers, explanations and calculations in two pages.