Given the following financial ratios, calculate the Altman's z-score for AZS Bank: working capital/total assets ratio is 0.3, retained earnings/total assets ratio is 0.01, earnings before interest and taxes/total assets ratio is -0.22, market value of equity/book value of total liabilities is 0.15, and sales/total assets ratio is 2.8: (Please enter your answer with 4 digits after the decimal point!)