Barbara buys 50 shares of DEM at $28.00 a share and 160 shares of GOP at $39.00 a share. She buys on margin and the broker charges interest of 9 percent on the loan. a. If the margin requirement is 37 percent, what is the maximum amount she can borrow? Round your answer to the nearest cent. $ b. If she buys the stocks using the borrowed money and holds the securities for a year, how much interest must she pay? Round your answer to the nearest cent. $ c. If after a year she sells DEM for $19.00 a share and GOP for $33.00 a share, how much did she lose on her investment? Use a minus sign to enter the amount as a negative value. Round your answer to the nearest cent. $ d. What is the percentage loss on the funds she invested if the interest payment is included in the calculation? Use a minus sign to enter the amount as a negative value. Round your answer to two decimal places. %