The following table provides the trading activities of five speculators: A, B, C, D, & E. Open Interest 0 2 Time Action 7:00 Trading opens for gold AM 8:00 Trader A buys 1 contract and Trader B sells 1 contract AM 9:00 Trader C buys 5 contracts and Trader D sells 5 contracts AM 10:00 Trader A sells 1 contract and Trader D buys 1 gold AM contract 11:00 Trader C sells 4 contracts and Trader E buys 6 gold AM contracts What is the number of open interest at 11:00 AM