Two investment advisers are comparing performance. One averaged a 21% rate of return and the other a 18% rate of return. However, the beta of the first investor was 1.4, whereas that of the second investor was 1. a. Can you tell which investor was a better selector of individual stocks (aside from the issue of general movements in the market)? First investor Second investor Cannot determine b. If the T-bill rate was 7% and the market return during the period was 13%, which investor would be considered the superior stock selector? Second investor First investor Cannot determine c. What if the T-bill rate was 4% and the market return was 17%? First investor Second investor Cannot determine