You opened a brokerage account and purchased 50 shares of TGT for $260 per share and deposit initial margin of 50K. The next day. TGT's price rises to $270 per share the next day. What are your actual margin and rate of return on your investment? a) 50%;7.69% b) 52.63%;7.69% c) 52.63%;11.11% d) 51.85%;11.11% e) 51.85%;7.69%