Assume that the risk-free rate is 8 percent, the required rate of return on the market (or an average-risk stock) is 13 percent, and the required rate of return on Acme Healthcare stock is 15 percent. What is the implied beta coefficient of the stock? (Hint: Use the SML equation with beta as the unknown.) 1. 1.50 2. 1.40 3. 1.20 4. 1.00 5. 0.80