4. Turn to the S\&P 500 contract in the figure below. (a) If the margin requirement is 10% of the futures price times the multiplier of $250, how much must you deposit with your broker to trade the March maturity contract? (b) If the March futures price were to increase to 1,150, what percentage return would you earn on your net investment if you entered the long side of the contract at the price shown in the figure? (c) If the March futures price falls by 1%, what is your percentage return? 4. Turn to the S\&P 500 contract in the figure below. (a) If the margin requirement is 10% of the futures price times the multiplier of $250, how much must you deposit with your broker to trade the March maturity contract? (b) If the March futures price were to increase to 1,150, what percentage return would you earn on your net investment if you entered the long side of the contract at the price shown in the figure? (c) If the March futures price falls by 1%, what is your percentage return