Case 6: Suppose you hold a diversified portfolio of a $10,000 investment in each of 20 different common stocks. The portfolio beta is equal to 1.20. Now, suppose you have decided to sell one of the stocks in your portfolio with a beta equal to 1.50 for $10,000 and to use these proceeds to buy another stock for your portfolio. Assume the new stock's beta is equal to 1.20. Calculate your old portfolio beta for the 19-stocks' portfolio after selling one of the stocks with a beta equal to 1.50. Question 1 options: e a. 1.125 b. 1.50- C. 1.185 d. 1.210