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

$r_1=5\mathrm{.}5\%,r_2=5\mathrm{.}9\%,r_3=6\mathrm{.}6\%,r_4=7\mathrm{.}4\%$

Assuming a constant real interest rate of $2$ percent, what are the approximate expected inflation rates for the next four years? $($Do not round Intermedlate calculatlons. Enter your answers as a percent rounded to $2$ decimal places.$)$

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