A optimal capital structure is defined as what? The capital structure that brings the weighted average cost of capital down to its lowest level The capital structure that employs the least debt possible The capital structure that reduces the chances of the company defaulting The capital structure that employs the most debt possible QUESTION 4 "Applying the capital asset pricing model requires that one find appropriate inputs for the risk-free rate, the market rate of return (and market risk premium), and beta. Why is beta, in particular, difficult to pin down?" "People must rely on historical information, and they have to assume that historical relationships continue into the future." Hackers have been known to manipulate financial data for their own purposes. People don thave ready access to financial data and won thave any source for this information in the near future. The major internet sources of financial data are notoriously unreliable