Boston Bottle (BB) buys and sells a variety of glass and plastic bottles nationwide. Each type of BB inventory has a unique item \#. An individual sale or purchase can consist of multiple inventory types which are each listed as a line item on the sale invoice or the purchase order. Data about inventory items are added to the database when a supplying vendor can be found for the new item who will provide a quoted price to BB. Vendors can supply many products and vice-versa. Customers are not assigned to any particular salesperson; anyone can service them. The same is true for vendors and buyers. A sale, a purchase, or a cash transaction involves just one BB employee. Customers and vendors are added to the database before any transactions with them take place. Cashiers handle cash receipts and disbursements, they are bonded, and they put all the receipts from any one day into just one account, but these accounts vary daily. New cash accounts are added to the database when they are opened. Employees are added to the database on the day they are hired. Warehouses are added to the database before they are used. All purchases are paid for immediately with a check drawn on a single account, but multiple accounts are used in purchasing activity. All check numbers are different from each other, even those from different accounts. Customers pay on the 25th of the month for all sales during the previous month. Cash receipts and disbursements take place within other cycles of BB. Required: Using the list of data elements on the following page (don't add or subtract any), construct a UML class diagram with classes, associations, and participation multiplicities specified. PLEASE USE THIS LAYOUT TO START YOUR MODEL. DATA ELEMENTS (Don't add or delete any) -inventory item \# -sale invoice \# -purchase ID \# -purchase \$ amount -check \# -remittance advice \# -customer \# -item weight -quantity of an item sold on this invoice -quantity of an item purchased on this order -sale \$ amount -check amount -cash receipt amount -customer name -individual accounts receivable -buyer employee \# -vendor name -salesperson employee \# -salesperson commission rate -cashier employee \# -buyer telephone \# -vendor's current price quote for an item -vendor's own product number for an inventory item -cashier fidelity bond plan -warehouse \# -warehouse \# -warehouse location -quantity of each bottle type at this warehouse