a$.$ Complete the following table given earnings before interest and taxes of $$18,000,$ $$42,000,$ and $$59,000.$ Assume the tax rate is $30$ percent. $($Negative amounts should be indicated by parentheses or a minus sign. Round your answers to $2$ decimal places.$)$

b$-1.$ What is the EBIT$/$TA rate when the firm's have equal EPS?

b$-2.$ What is the cost of debt?

b$-3.$ State the relationship between earnings per share and the level of EBIT.

c$.$ If the cost of debt went up to $12$ percent and all other factors remained equal, what would be the break$-$even level for EBIT?