The Evanec Company's next expected dividend, $D_1,$ is $$3\mathrm{.}64$; its growth rate is $6\%$; and its common stock now sells for $$30\mathrm{.}00.$ New stock $($external equity$)$ can be sold to net $$24\mathrm{.}00$ per share.

a$.$ What is Evanec's cost of retained earnings, $r_s?$ Do not round intermediate calculations. Round your answer to two decimal places.

$r_s=\%$

b$.$ What is Evanec's percentage flotation cost, F$?$ Round your answer to two decimal places.

$F=\%$

c$.$ What is Evanec's cost of new common stock, re $?$ Do not round intermediate calculations. Round your answer to two decimal places.

$r_e=\%$