Complete the following two questions:

a. Determine the Primary key in the following table. (2 marks)

OrderItem
OrderNumber	ProductNumber	Qty
27	P01	5
45	P04	8
27	P02	10
56	P04	4

b. What are the appropriate data types that can be used for the following fields? (4 marks)

i. OrderStatus (placed, cancelled, processed etc.)

ii. Title

iii. expiryDate

iv. ApprovalDate