15. You hold a diversified portfolio consisting of a P10,000 investments in each of 10 different common stocks. The portfolio beta is equal to 1.9. You have decided to sell one of your stocks, a lead mining stock whose 3 = 1.0, for 10,000 net and to use the proceeds to buy P10,000 of stock in a steel company whose B = 3.0. What will be the new beta of the portfolio