Use the following information to make projections regarding G Inc. $2024.$ Assume that revenue growth is $5\%,$ depreciation is $5\%$ of fixed assets, EBITDA margin increases from $12\%$ to $13\%$ of revenue, interest is $12\mathrm{.}5\%$ of the prior year$$s total debt. Cash, prepaid expenses, and fixed assets are unchanged, all working capital accounts increase as a fixed $\%$ of revenue. The tax rate is $34\%($if applicable$).$

a$)$ How much new debt does G require in $2024$ to fund its sales growth?

b$)$ Calculate both ROA and ROE for $2024.$ Why are these two ratios so different?