Radon Homes' current EPS is $$7\mathrm{.}10.$ It was $$4\mathrm{.}885$ years ago. The company pays out $40\%$ of its earnings as dividends, and the stock sells for $$30.$

Calculate the historical growth rate in earnings. $($Hint: This is a $5-$year growth period.$)$ Do not round intermediate calculations. Round your answer to two decimal places. $\%?$

Calculate the next expected dividend per share, D$1.($Hint: D$0=0\mathrm{.}40($$$7\mathrm{.}10)=$ $$2\mathrm{.}84.)$ Assume that the past growth rate will continue. Do not round intermediate calculations. Round your answer to the nearest cent. $$?$

What is Radon's cost of equity, rs$?$ Do not round intermediate calculations. Round your answer to two decimal places.$\%?$ Barton Industries can issue perpetual preferred stock at a price of $$60$ per share. The stock would pay a constant annual dividend of $$2\mathrm{.}80$ per share. If the firm's marginal tax rate is $25\%,$ what is the company's cost of preferred stock? Round your answer to two decimal places. $\%?$