A company's common stock currently sells for $$22\mathrm{.}50$ per share, the expected dividend for the coming year is $$1\mathrm{.}92,$ and its expected constant growth rate is $6\mathrm{.}00\%.$ New stock can be sold to the public at the current price, but a flotation cost of $8\%$ would be incurred. By how much would the cost of new stock exceed the cost of retained earnings? Do not round your intermediate calculations.

$$ a$.\mathrm{.}63\%$

$$ b$.\mathrm{.}55\%$

O c$.\mathrm{.}82\%$

O d$.\mathrm{.}08\%$

$0$ e$.74\%$