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Tinsley, Incorporated, wishes to maintain a growth rate of 15 percent per year and a debt-equity ratio of 7 . The profit margin is 42 percent, and total asset turnover is constant at 1.12 a. What is the dividend payout ratio? Note: A negative answer should be indicated by a minus sign. Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g. 32.16. b. What is the maximum sustainable growth rate for this company? Note: Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16