The chart above shows a quote for a futures contract on the Standard & Poor's 500 Index. (a) If the margin requirement is 10%, how much must you deposit into your margin account to trade the September 2015 contract? Recall that the futures price is multiplied by a multiple of $250 to get total contract value. (b) If the September 2015 futures price were to increase to 2, 050, what would be your percentage return on your investment if you entered the long side of the contract at the price shown in the figure? (c) If the September futures price falls by 1%, what is the percentage gain or loss on your net investment