If a company decides to increase its ratio of total debt / total assets from 30% to 50% as a means of increasing its return on equity (ROE), and it is able to maintain a 7.5% return on assets (ROA), what is the return on equity (ROE) with the two different total debt/total asset ratios? (Please show work) Part 2. What is the critical underlying assumption that enables a firm to increase Return on Equity via increased financial leverage or higher debt