Question 5 10 pts A portfolio comprises Coke (beta of 1.6), U.S. Treasury Bill, and S&P 500 index. The amount invested in Coke is $10,000, in U.S. Treasury Bill is $20,000, and in S&P 500 index is 10,000. What is the beta of the portfolio? 1.15 O 0.9 1.6 0.65 2.6