Stock Price History

Beta (5Y Monthly)	1.39
52-Week Change 3	-31.24%
S&P500 52-Week Change 3	16.25%
52 Week High 3	39.78
52 Week Low 3	14.33
50-Day Moving Average 3	25.68
200-Day Moving Average 3	26.33

Balance Sheet

Total Cash (mrq)	30.98B
Total Cash Per Share (mrq)	21.65
Total Debt (mrq)	128.26B
Total Debt/Equity (mrq)	294.89
Current Ratio (mrq)	1.12
Book Value Per Share (mrq)	28.07

From General motors info above of debt level and the corporations share price, what should be the firm optimal capital structure? Justify your answer through graph