196 Part II Database Analysis and Logical Design TABLE 4-7 Pine Valley Furniture Company Purchasing Data Attribute Name Sample Value Material ID 3792 Material Name Hinges 3" locking Unit of Measure each Standard Cost $5.00 Vendor ID V300 Vendor Name Apex Hardware Unit Price $4.75 Terms Code 1 Terms COD a 4-42. The materials manager at Pine Valley Furniture Com- pany maintains a list of suppliers for each of the material items purchased by the company from outside vendors. Table 4-7 shows the essential data required for this appli- cation. a. Draw a dependency diagram for this data. You may assume the following: Each material item has one or more suppliers. Each supplier may supply one or more items or may not supply any items. The unit price for a material item may vary from one vendor to another. The terms code for a supplier uniquely identifies the terms of the sale (e.g., code 2 means 10 percent net 30 days). The terms for a supplier are the same for all material items ordered from that supplier