The Shrieves Corporation has $$25,000$ that it plans to invest in marketable securities$.$ It is choosing among AT&T bonds $($which yield $8\mathrm{.}8\%),$ AT&T preferred stock $($with a dividend yield of $8\mathrm{.}0\%),$ and state of Florida muni bonds $($which yield $7\%$ but are not taxable$).$ The federal tax rate is $21\%($ignore any possible state corporate taxes$).$ Recall that $50\%$ of dividends received are tax exempt. Find the after$-$tax rates of return on all three securities after paying federal corporate taxes. Round your answers to three decimal places.

After$-$tax rate of return on AT&T bond:

$\%$

After$-$tax rate of return on AT&T preferred stock:

$\%$

After$-$tax rate of return on Florida muni bonds:

$\%$