ABC, Inc., had equity of $180,000 at the beginning of the year. At the end of the year, the company had total assets of $335,000. During the year, the company sold no new equity. Net income for the year was $38,000 and dividends were $5,200.

The answer to a is 10.85%. I cannot get b or c.

a.	Calculate the internal growth rate for the company. (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)
b.	Calculate the internal growth rate using ROA b for beginning of period total assets. (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)
c.	Calculate the internal growth rate using ROA b for end of period total assets. (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)