Loreto Incorporated has the following financial ratios: asset turnover $=1\mathrm{.}60$; net profit margin $($i$.$e$.,$ net income$/$sales$)=6\%$; payout ratio $=25\%$; equity$/$assets $=0\mathrm{.}80.$

a$.$ What is Loreto's sustainable growth rate?

b$.$ What is its internal growth rate?

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