7. The optimal risky portfolio in the Markowitz model is (a) a feasible portfolio that maximizes expected return (b) a portfolio that maximizes the Sharpe Ratio (c) a portfolio that lies along the Capital Allocation Line tangent to the minimum- variance frontier (d) (b) and (c) 8. Scott buys 10 shares of J+D Chili stock on margin at $10 per share with $60 of margin and a $40 broker's call loan. The maintenance rate is 20%. At what stock price would a margin call be triggered? (a) $5 per share (b) $7.50 per share (c) $20 per share (d) $30 per share