please any one can help me to answer these questions.Thank you for your help

Company's approved registration statement for new securities by SEC is called a) a best-efforts agreement. b) a firm commitment agreement c) a competitive bid agreement. d) the prospectus. e) a red herring Question 4 0 / 1 point You opened a margin account with a brokerage firm and purchased 300 shares of COF for $93 per share and deposit initial margin of 60%. The next day, COF's price drops to $90 per share. What are your actual margin and rate of return for this investment? . a) 57.5%; -9.8% b) 58.67%; -5.38% c) 58.67%; -7.94% d) 57.5%; -5.88% 25.32%; -8.77% Question 5 0 / 1 point You opened a margin account with a brokerage firm and purchased 300 shares of COF for $93 per share and deposit initial margin of 60%. The next day, COF's price rises to $97 per share the next day. What are your actual margin and rate of return on your investment? a) 61.65%; 7.17% b) 61.65%; 5.88% c) 56.55%; 6.49% d) 33.33%; 5.48% e) 55%; 7.17%