Consider this case: Blue Elk Manufacturing has no debt in its capital structure and has $300 million in assets. Its sales revenues last year were $90 million with a net income of $5 million. The company distributed $1.80 million as dividends to its shareholders last year. What is the firm's sustainable growth rate? Which of the following are assumptions of the sustainable (self-supporting) growth model? Check all that apply. The firm maintains a constant net profit margin. The firm maintains a constant ratio of assets to equity. The firm's liabilities and equity must increase at the same rate. The firm pays no dividends