Using a 6% interest rate, find the present value of timber harvest income of $3,300 that occurs every 40 years, starting 40 years from now. b. What percentage of the present value calculated in part a comes from the first harvest and what percentage comes from the remaining harvests? c. Assume the timber stand in part a is already 20 years old. Find the present value of timber harvest income of $3,300 every 40 years, starting 20 years from now.