a . Using the free cash flow valuation model , show the only avenues by which capital structure can affect value . b. ( 1 ) What is business's risk ? What factors influence a firm's business risk ?" ( 2) What is operating leverage , and how does it affect a firm's business risk ?" Show the operating break-even point if a company has fixed costs of $ 200 , a sales price of $ 15 , and variable costs of $ 10