please help, ty

4 points Which of the following statements regarding market efficiency is(are) CORRECT? 1. An efficient market is one in which security prices reflect all past information. II. The efficient market hypothesis states that securities markets are efficient and security prices reflect their true economic value. III. The weak form of market efficiency imolves historical data, whereas the semistrong and strong forms imvolve the assimilation of all public and private information, respectively. I land II It and III all of them 11 points Which the following statements regarding the use of the correlation coefficient in reducing portfolio risk is(are) correct? 1. combining securities that have perfect positive correlation with each other provides perfect portfolio risk reduction II. combining 2 securities that have perfect negative correlation provides perfect portfolio risk reduction IIL. investors should seek out securities with the least correlation possible to reduce portfolio risk Iand II II and III all of them 4 points Which of the following statements regarding market efficiency is(are) CORRECT? 1. An efficient market is one in which security prices reflect all past information. II. The efficient market hypothesis states that securities markets are efficient and security prices reflect their true economic value. III. The weak form of market efficiency imolves historical data, whereas the semistrong and strong forms imvolve the assimilation of all public and private information, respectively. I land II It and III all of them 11 points Which the following statements regarding the use of the correlation coefficient in reducing portfolio risk is(are) correct? 1. combining securities that have perfect positive correlation with each other provides perfect portfolio risk reduction II. combining 2 securities that have perfect negative correlation provides perfect portfolio risk reduction IIL. investors should seek out securities with the least correlation possible to reduce portfolio risk Iand II II and III all of them