Consider a portfolio of 250 shares of rm A worth $30/share and 1500 shares of rm B worth $20/share. You expect a return of 4% for stock A and a return of 9% for stock B. (a) What is the total value of the portfolio, what are the portfolio weights and what is the expected return? (b) Suppose rm A's share price falls to $24 and rm B's share price goes up to $22. What is the new value of the portfolio? What return did it earn? After the price change, what are the new portfolio weights?