Find div F and curl F of 
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Definitions:
Coupon Rate
The interest rate stated on a bond when issued, which represents the annual interest payment as a percentage of the bond's face value.
Unlevered Cost of Capital
The cost of capital for a company without debt, reflecting the risk of its equity alone.
Cost of Debt
The effective rate that a company pays on its current debt, inclusive of all fees and interest.
Total Assets
The sum of all assets owned by a company, including cash, investments, equipment, and real estate.
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