Suppose 1-year T-bills currently yield 7.00% and the future inflation rate is expected to be constant at 5.20% per year. What is the real risk-free rate of return, r ? The cross-product term should be considered, i.e., if averaging is required, use the geometric average. (Round your final answer to 2 decimal places.) a) 2.07% b) 1.73% C) 1.71% d) 1.97% e) 1.35%