David wants to make improvements to the management of his company invetory and will like to start by developing a set of tables to store the following data about purchases of inventory:

product number. date of purchase

supplier number. supplier address

supplier name. unit price

quantity purchased. employee number

employee name. purchase order number

product description. quantity on hand

total amount of purchase

(a)

Design a set of relational tables to store this data

.(b)

Identify the primary key for each table

.(c)

Identify the foreign keys needed in the tables to implement referential integrity

.(d)

Make up data values for two records within each table.