. Selected financial ratios for RMN, Incorporated, are as follows: 20X1 20X2 20X3 Current ratio 4.2 2.6 1.8 Acid-test ratio 2.1 1.0 0.6 Debt-to-total-assets 23% 33% 47% Inventory turnover 8.7x 5.4x 3.5x Average collection period 33 days 36 days 49 days Total asset turnover 3.2x 2.6x 1.9x Net profit margin 3.8% 2.5% 1.4% Return on investment (ROI) 12.1% 6.5% 2.8% Return on equity (ROE) 15.7% 9.7% 5.4% a. Why did return on investment decline? b. Was the increase in debt a result of greater current liabilities or of greater long-term debt? Explain