The margin requirement on the S&P 500 futures contract is 6%, and the stock index is currently 1,700 Each contract has a multiplier of $250 a. How much margin must be put up for each contract sold? Margin b. If the futures prior falls by 2 to 1,666. what will happen to the margin account of an investor who holds one contract? (input the amount as a positive value) Margin account Click to select) by 5 c.1. What will be the investor's percentage return based on the amount put up as margin (Negative value should be indicated by a minus sign. Round your answer to 2 decimal places Percentage return c-2. What would be the current cash balance in the margin account? Cash balance $