What is the standard deviation of an equally weighted portfolio of two stocks with a covariance of 0.009, if the standard deviation of the first stock is 15% and the standard deviation of the second stock is 20%? a. 14.7% b. 2.1% c. 7.8% d. 14.2% e. 2.0% Suppose you buy a round lot of DG Solutions stock on 60 percent margin when it is selling at $55 a share. The broker charges a 10 percent annual interest rate and commissions are 3 percent of the total stock value on both the purchase and the sale. If at year end you receive a $1.10 per share dividend and sell the stock for 55 5/8, what is your rate of return on the investment? a.-10.95 percent b. 21.84 percent c. 28.38 percent d.-12.84 percent e.-10.38 percent