Consider the following spot interest rates for maturities of one, two, three, and four years.

r1 = 4.0%

r2 = 4.5%

r3 = 5.2%

r4 = 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.)