A perpetuity pays $4100 at the end of every month for 11 months of each year. At the end of the 12th month of each year, it pays double that amount. If the effective ANNUAL rate is 9.1%, what is the present value of this perpetual annuity? Problem #4: Answer correct to 2 decimals. Just Save Submit Problem #4 for Grading Problem #4 Attempt #1 Attempt #2 Attempt #3 Your Answer: Your Mark: Problem #5: A loan of $58,000 is paid off in 36 payments at the end of each month in the following way: Payments of $1450 are made at the end of the month for the first 12 months. Payments of $1450 +x are made at the end of the month for the second 12 months. Payments of $1450 + 2x are made at the end of the month for the last 12 months. What should x be if the nominal monthly rate is 11.2%? Problem #5: Answer correct to 2 decimals. Problem #6: An investor pays $500,000 for a mine that will produce level annual revenue for 21 years. What should the level annual revenue be (received at the end of each year) if the investor is to receive 6% annual return on the investment while recovering the principal in a sinking fund earning 4.5% per year? Problem #6: Answer correct to 2 decimals. Just Save Submit Problem #6 for Grading Problem #6 Attempt #1 Attempt #2 Attempt #3 Your Answer: Your Mark: