Present value$($with changing interest$$ rates$).$Marty has been offered an injury settlement of $$$$9$ comma $000$ payable in $3$ years. He wants to know what the present value of the injury settlement is if his opportunity cost is $5\%.($The opportunity cost is the interest rate in this$$ problem.$)$ What if the opportunity cost is $7\mathrm{.}5\%?$ What if it is $10\%?$

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Part $1$

If$$ Marty's opportunity cost is $5\%,$ what is the present value of the injury$$ settlement?