2. (5 points) Last Friday, 7,200 contracts traded on the CME on a particular commodity. The types of trades are summarized below: Short Positions Long Positions New short positions 2,700New long positions 3,500 Short to close positions4,500Long to close positions3,700 Total Short Positions Total Short Positio 7,200 Total Long Positions By how much did open interest change for the day