Suppose 1-year Treasury bonds yield 3.20% while 2-year T-bonds yield 4.80%. Assuming the pure expectations theory is correct, and thus the maturity risk premium for T-bonds is zero, what is the yield on a 1-year T-bond expected to be one year from now? Do not round your intermediate calculations. Round your final answer to 2 decimal places. a. 4.00% b. 6.42% c. 3.51% O d. 4.76% O e. 6.63%