Help pls

1. Billy invests only securities that have performed well in the recent month. Which form of market efficiency must exist if he is able to earn excess profits on these investments? A. strong B. semistrong C. weak D. None of the above 2. Given the following correlation matrix, a risk-averse investor would least prefer which of the following 2-stock portfolios (all else equal)? Q R S Stock P Q R S A. P and Q B. Q and R C. P and S D. R and S P +1 -0.2 +0.5 +0.7 +1 -0.1 -0.3 +1 +0.4 +1 3. If Paul places a order, the stock will be bought if its price rises above the stipulated level. If Mary places a order, the stock will be sold if its price falls to the stipulated level. A. market; limit B. stop-buy; stop-loss C. limit; market D. stop-loss; stop-buy