The following table shows the prices of a sample of Treasury strips. Each strip makes a single payment at maturity. Years to Maturity 1 2 3 4 Price, % of face value) 97.052% 93.551 89.744 85.680 a. What is the 1-year interest rate? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) b. What is the 2-year interest rate? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) c. What is the 3-year interest rate? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) d. What is the 4-year interest rate? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) e. Is the yield curve upward-sloping, downward-sloping, or flat? f. Is this the usual shape of the yield curve