Plank's Plants had net income of $4,000 on sales of $90,000 last year. The firm paid a dividend of $400. Total assets were $300.000, of which $180,000 was financed by debt. a. What is the firm's sustainable growth rate? (Do not round intermediate calculations. Enter your answer as a percent rounded to 1 decimal place.) Sustainable growth rate OOK Hint b. If the firm grows at its sustainable growth rate, how much debt will be issued next year? (Do not round intermediate calculations.) Print New debt c. What would be the maximum possible growth rate if the firm did not issue any debt next year? (Do not round intermediate calculations. Enter your answer as a percent rounded to 1 decimal place.) Maximum growth rate