Consider the following spot interest rates for maturities of one, two, three, and four years. ri = 3.9% r2 = 4.5% r3 = 5.2% r4 = 6.0% What are the following forward rates, where fk,1 refers to a forward rate beginning in k years and extending for 1 year? (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.) f2,1 % f3,1 %