Ignoring the interest gained or lost from margin requirements on futures contracts, consider a position in which you take a long position in one barrel of January crude oil futures at $75 on October 30 and a short position in one barrel of January crude oil futures at $65 on November 15. The two contracts both expire on the same date (4 trading days before December 25), and both call for delivery on January 2022. The price of oil for January delivery on the futures market falls from $75 on October 30 to $65 on November 15. Create three charts. One chart should show the net gain or loss at expiration (on the vertical axis) as a function of the spot crude oil price (on the horizontal axis) at the expiration of each of the long futures position. The second chart should show the net gain or loss on the short futures position. The third chart should show the total gain or loss of the combined position. The spot price values on the horizontal axis in each chart should run from $40 to $80.