Thaler & Co$.\text{'}$s common shares are currently trading at $$\frac{9\mathrm{.}25}{?}$ share and paid a $$0\mathrm{.}75$ dividend last year. Their dividends are expected to grow at a $1\mathrm{.}4\%$ annual rate. Thaler's current tax rate is $21\%.$

What is their current cost of common equity?

$8\mathrm{.}2\%$

$7\mathrm{.}6\%$

$10\mathrm{.}9\%$

$6\mathrm{.}8\%$

$9\mathrm{.}6\%$