Peter Diamond owed Carter $500,000 secured by a first mortgage on Diamond’s plant and land. Stephens was a surety on this obligation in the amount of $250,000. After Diamond defaulted on the debt, Carter demanded and received payment of $250,000 from Stephens. Carter then foreclosed upon the mortgage and sold the property for $375,000. What rights, if any, does Stephens have in the proceeds from the sale of the property?