Mr. Pitkin bought a farm and promised to pay $6825 in 6 years with 7% simple interest and $10925 in 14 years with 10.75% simple interest. Later, Mr. Pitkin met with the lender requesting to pay $6875 at the end of 4 years and to make a final payment at the end of 11 years. Based on a simple interest rate of 17.5%, determine the amount required to settle the debt at the end of 11 years. $