Develop a class diagram including associations and multiplicities, based on the following narrative. The Trading System must take care of sales information of the company and must analyze the potential of the trade. A Trading System has the information about the customer such as name, address and phone number, who can place one or more orders. An order can be placed for one or more products at a time. Each product has an ID, name and price. Each order contains the item name, the total number of items ordered and the destination address. Whenever an order is placed the availability of products is checked against the stock. If the products are available then the shipment database is updated. An invoice is generated for each order. Any number of transactions may be done for one order