Consider the following spot interest rates for maturities of one two, three, and four years. 6.4% r2 70% 3-77% r4 8.5% What are the following forward rates, where k refers to a forward rate for the period beginning in one year and extending for k years? (Do not round intermediate calculations. Enter your s answers as a percent rounded to 2 decimal places.) f1,1 f1.2 f1.3