c3 q8 please help with all 3 parts

Present value (with changing interest rates). Marty has been offered an injury settlement of $11,000 payable in 4 years. He wants to know what the present value of the injury settlement is if his opportunity cost is 4%. (The opportunity cost is the interest rate in this problem.) What if the opportunity cost is 7% ? What if it is 10.5% ? If Marty's opportunity cost is 4%, what is the present value of the injury settlement? $ (Round to the nearest cent.)