4. (10 points) Suppose that an investment manager has earned above-median returns in the past 10 years. a. If the investment manager is actually blindly" selecting stocks, how likely will he earn above-median returns for 10 years in a row? Hint: suppose the probability of a person earning above-median returns is 50% if he/she blindly select stocks. b. Is the investment manager's performance evidence for an inefficient market? Why or why not? C. Suppose the investment manager's experience is NOT unique, that is, investment managers that outperform others in the previous year tend to outperform others again in the current year. Is this evidence for an inefficient market, and why or why not