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

$r_1=4\mathrm{.}6\%,r_2=5\mathrm{.}2\%,r_3=5\mathrm{.}9\%,r_4=6\mathrm{.}7\%$

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.