2. Mr. Ting owns a portfolio with the following characteristics. Assume that returns are generated by a one-factor model. Security Fl-sensitivity Proportion Expected Return A 2.0 .20 20% B 3.5 .40 10 C 0.5 .40 5 Mr. Ting decides to create an arbitrage portfolio by increasing the holdings of security A by 0.20 (remember that X3 must equal to XA X3). (a) What must be the weights of the other two securities in Mr. Ting's arbitrage portfolio? (b) What is the expected return of the arbitrage portfolio? (c) If everyone follows Mr. Ting's buy-and-sell decisions, what will be the effects on the prices of the three securities