You hold a diversified $100,000 portfolio consisting of 20 stocks with $5,000 invested in each. The portfolio's beta is 1.20. You plan to sell a stock with b = 0.60 and use the proceeds to buy a new stock with b = 1.90. What will the portfolio's new beta be? Do not round your intermediate calculations. a. 1.295 b. 1.230 c. 1.900 d. 1.265 e. 1.550