Currently, the risk-free rate is 10 percent and the expected return on the market portfolio is 15 percent. Market analysts' return expectations for four stocks are listed here, together with each stock's expected beta. STOCK TENEUTED RETURN EXPECTED BETA 0.8 1. Stillman Zinc Corporation 2. Union Paint Company 3. National Automobile Company 4. Parker Flectronics, Inc. 15.5 If the analysts' expectations are correct, which stocks (if any) are overvalued? Which (if any) are undervalued