If a company has the following financial ratios. What is the sustainable growth rate?

Total asset turnover $=2\mathrm{.}65,$ Profit Margin $=5\mathrm{.}7\%,$ Equity multiplier $=1\mathrm{.}6,$ Payout ratio $=70\%$

The answer is $7\mathrm{.}82\%.$ Please show me how you get the answer in details with Excel $($lay out your initial inputs and use cell reference to calculate the numbers$).$