Suppose you hold a portfolio consisting of a $10,000 investment in each of 8 different common stocks. The portfolio's beta is 1.25. Now suppose you decided to sell one of your stocks that has a beta of 1.00 and to use the proceeds to buy a replacement stock with a beta of 1.55. What would the portfolio's new beta be? Do not round your intermediate calculations. Round your final answer to 2 decimal places. a. 1.32 b. 1.80 c. 1.29 d. 1.53 e. 1.57