Great Catch Corp.$\text{'}$s cost of debt is $7\%$ and its cost of equity is $17\%.$ Great Catch Corp. is expected to generate $$13$M per year in perpetuity and its debt$-$to$-$equity ratio is $0\mathrm{.}1.$ Find the appropriate discount rate to be used under the APV method to value Great Catch Corp. The tax rate is $20\%.$

$19\mathrm{.}2\%$

$20\mathrm{.}8\%$

$18\mathrm{.}7\%$

$16\mathrm{.}3\%$

$20\mathrm{.}4\%$