Suppose the rate of return on short-term government securities (perceived to be risk-free) is about 6%. Suppose also that the expected rate of return required by the market for a portfolio with a beta of 1 is 15%. According to the capital asset pricing model: a. What is the expected rate of return on the market portfolio? (Round your answer to 2 decimal places.) b. What would be the expected rate of return on a stock with = 0? (Round your answer to 2 decimal places.) c. Suppose you consider buying a share of stock at $54. The stock is expected to pay $4 dividends next year and you expect it to sell then for $56. The stock risk has been evaluated at = .5. Is the stock overpriced or underpriced?