Tinsley, Incorporated, wishes to maintain a growth rate of $15\mathrm{.}25$ percent per year and a debt$-$equity ratio of $\mathrm{.}75.$ The profit margin is $4\mathrm{.}1$

percent, and total asset turnover is constant at $1\mathrm{.}11.$

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$.,32\mathrm{.}16.$

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$.,32\mathrm{.}16.$