Please help me resolve this. It came back as wrong for the second part .

a. Sustainable growth calculation:
Profit margin		8.80%	3.72%	4.86%
Retention ratio		1.00	1.00	0.98
Asset turnover		1.03	1.09	1.19
Financial leverage		N/A	1.87	1.56
Sustainable growth (g*)		N/A	7.60%	8.84%
Actual growth		2.88%	43.71%	12.10%
g*-g		N/A	-36.12%	-3.26%
Part B:
In my opinion,this company is matured and can pay dividends at the end of the 5th year