a. Use the appropriate formula to find the value of the annuity. b. Find the interest. Time Periodic Deposit $40 at the end of each month Rate 4% compounded monthly 15 years Click the icon to view some finance formulas. a. The value of the annuity is $ . N (Do not round until the final answer. Then round to the nearest dollar as needed.) b. The interest is $ (Use the answer from part (a) to find this answer. Round to the nearest dollar as needed.) ts