Question 3 4 pts The margin requirement on the S&P 500 futures contract is 10%, and the stock index is currently 2,000. Each contract has a multiplier of $50. How much margin must be put up for each contract sold? If the futures price falls by 1% to 1,980, how much will the margin account of an investor who holds one contract change? What will be the investor's percentage return based on the amount put up as margin? What would be the current cash balance in the margin account