Stancorp has a $ $11\mathrm{.}3$ million debt issue$$ outstanding, with a $5\mathrm{.}8\%$ coupon rate. The debt has$$ semi$-$annual coupons, with the next coupon is due in six months. The debt matures in five years. It is currently priced at $96\%$ of par value.

a$.$ What is$$ Stancorp's pre$-$tax cost of$$ debt? Note: Compute the effective annual return.

b$.$ If Stancorp faces a $30\%$ tax$$ rate, what is its$$ after$-$tax cost of$$ debt?