Given the balance sheet shown below $($values in $ millions$)$:

$\backslash$table$[[$Assets$,$Liabilities,$],[$Loans$,260,$Deposits,$500],[$Investments$,1,500,$Short$-$term debt,$1,000],[$Cash and reserves,$200,$Long$-$term debt,$400]]$

$($a$)$ What percentage rise in investment value would triple shareholder value?

$($b$)$ Calculate the percentage drop in investment value that would be sufficient to drive the firm bankrupt.

$($c$)$ For each $$100$ of assets, how much is financed by debt?