Suppose your portfolio is comprised of 1,000 shares of American Airlines, 1,000 shares of Delta Airlines, and 1,000 shares of United Airlines. The beta for American is 3.85, for, Delta it is 1.33, and for United it is 1.71. The stock price for American is $42, for Delta is $44.50, and for United is $56. Find the beta of your portfolio.