Problem 1 (10 points). Robin's broker sold 800 shares of a non-dividend paying stock this morning for a total of $29,440. Robin had purchased these shares on margin nine months ago at a cost per share of $30. The initial margin requirement on this stock was 60 percent and the maintenance margin was 30 percent. Robin paid 1.2 percent over the call money rate of 4.9 percent. There were no dividends paid during the period. a) What was her return on this investment? b) How much would have been her return if she had bought the shares using a cash account