please solve in Excel with showing all the formulas, thank you

1-14. The original amount of an inheritance was just sufficient at 8% effective to pay 5000 at the end of each year for 10 years. The payments of 5000 were made for the first 5 years even though the fund actually cared 10% effective. How much excess interest was in the fund at the end of 5 years? 5. George was making annual payments of X on a 16% 10-year loan. After making 4 payments, he renegotiates to pay off the debt in 3 more years with the lender being satisfied with 14% over the entire period. Find an expression for the new payment. 4:16. Harriet is repaying a loan with payments of 3000 at the end of every two years. If the amount of interest in the 5 installment is 2,982.31, find the amount of principal in the geh installment. Assume 1 = 13