Refer to the Mini$-$S&P contract in Figure $22\mathrm{.}1.$ Assume the closing price for this day.

Required:

If the margin requirement is $18\%$ of the futures price times the contract multiplier of $$50,$ how much must you deposit with your broker to trade the December maturity contract?

If the December futures price increases to $$4,402,$ what percentage return will you earn on your investment if you entered the long side of the contract at the price shown in the figure?

If the December futures price falls by $1\%,$ what is your percentage return?