The Goodsmith Charitable Foundation, which is tax$-$exempt, issued debt last year at $9$ percent to help finance a new playground facility in Los Angeles. This year the cost of debt is $25$ percent higher; that is$,$ firms that paid $11$ percent for debt last year will be paying $13\mathrm{.}75$ percent this year.

a$.$ If the Goodsmith Charitable Foundation borrowed money this year, what would the aftertax cost of debt be$,$ based on its cost last year and the $25$ percent increase?

Note: Do not round intermediate calculations. Input your answer as a percent rounded to $2$ decimal places.

Aftertax cost of debt

:

If the receipts of the foundation were found to be taxable by the IRS $($at a rate of $25$ percent because of involvement in political activities$),$ what would the aftertax cost of debt be$?$

Note: Do not round intermediate calculations. Input your answer as a percent rounded to $2$ decimal places.

Aftertax cost of debt

$\%$