I need help with these three questions

The U.S. Securities and Exchange Commission periodically charges individuals with insider trading and claims those individuals have made unfair profits. Given this, you would be most apt to argue that the markets are less than form efficient: Weak Semi-weak Semi-strong Strong Perfect When a manager develops a cost of capital for a specific project based on the cost of capital for another firm that has a similar line of business as the project, the manager is utilizing the approach. Subjective risk Pure play Divisional cost of capital Capital adjustment Security market line A stock has annual returns of 5 percent, 21 percent. -12 percent. 7 percent, and-6 percent for the past five years. The arithmetic average of these returns is percent while the geometric average return for the period is percent. 3.89; 3.52 3.89; 4.26 3.62; 3.89 3.00; 3-28 3.00; 2.37