Moon has currently $$50$ million in debt bearing $10\%$ interest.. Its dividend is $$2$ million and transfer to retained earnings is $$10$million. Tax rate is $40\%.$ What is the present times interest earned $($TIE$)$ ratio? How much additional debt at $10\%$ interest rate can the firm issue and maintain its TIE ratio at $3\mathrm{.}5?$