Compute the present value of interest tax shields generated by these three debt issues. Consider corporate taxes only. Assume that the marginal tax rate is Tr=0.30. a. A $1,700, one-year loan at 9%. Note: Do not round intermediate calculations, Round your answer to 2 decimal places. b. A seven-year loan of $1,700 at 9%. Assume no principal is repaid until maturity. Note: Do not round intermediate calculations. Round your answer to 2 decimal places. c. A $1,700 perpetuity at 8%. Compute the present value of interest tax shields generated by these three debt issues. Consider corporate taxes only. Assume that the marginal tax rate is Tr=0.30. a. A $1,700, one-year loan at 9%. Note: Do not round intermediate calculations, Round your answer to 2 decimal places. b. A seven-year loan of $1,700 at 9%. Assume no principal is repaid until maturity. Note: Do not round intermediate calculations. Round your answer to 2 decimal places. c. A $1,700 perpetuity at 8%