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

$r_1=4\mathrm{.}4\%,r_2=4\mathrm{.}9\%,r_3=5\mathrm{.}6\%,r_4=6\mathrm{.}4\%$

Assuming a constant real interest rate of $2$ percent, what are the approximate expected inflation rates for the next four years?

Note: Do not round intermediate calculations. Enter your answers as a percent rounded to $2$ decimal places.

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