Using the free cash flow valuation model, show the only avenues by which capital structure can affect value.

$(1)$What is business 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.$

Explain the difference between financial risk and business risk.