A game of chance offers a payoff of $500 with probability of 0.3. $200 with probability of 0.3, and -$100 with probability of 0.4. Each play of the game costs $300, so the net profit per play is the payoff less the cost. What is the standard deviation of this rate of return? O 0.83 10249 O 0.69 1.25 Suppose Apple stock has expected return of 20% and standard deviation of 55%, and Amazon stock has expected return of 15% and standard deviation of 30%. Their correlation coefficient is 0.3. Which weighting on Apple stock gives you the lowest two-stock portfolio risk? O 19.02% 26.83% O 13.80X