Consider the following spot interest rates for maturities of one, two, three, and four years. r_1 = 3.9% r_2 = 4.5% r_3 = 5.2% r_4 = 6.0% Assuming a constant real interest rate of 2 percent, what are the approximate expected inflation rates for the next four years? (Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places. Omit the "%" sign in your response.) I_1 % I_2 % I_3 % I_4 %