These are the orders that arrived on the floor of the BATs exchange last week. 1) At 9.40 Bob submits an order "buy 200 , limit 50.10 ". Explain whether a trade will occur, and if so, who are the counterparties? What is the price and size of each counterparty's trade? 2) If instead, Bob's order had been " sell 1200 , limit 50.04 ". Explain whether a trade will occur, and if so, who are the counterparties? What is the price and size of each counterparty's trade? 3) To the original book, Bob submits "Buy 500, limit 50.11". Explain whether a trade will occur, and if so, who are the counterparties? What is the price and size of each counterparty's trade? 4) What does the limit order book look like after the order in question (3) above