***DO NOT COPY FROM CHEGG PLEASEEEEEE!!!!!***

I need this in Data Base, relational Algebra expression

Write relational algebra expressions for the following queries based on the tables below.

Product(SKU, Description, Price, Location)

Guests(CardNo, Name, Address)

Purchase(CardNo, SKU, StoreNum, When, Markdown)

Store(StoreNo, Address, Phone)

Inventory(SKU, StoreNum, Qty)

5. All of the products not carried at store 1416

6. Descriptions of all products purchased by both Laverne Cox and Vanna White.

7. The greatest discount on any product (renaming can be used to calculate a derived attribute; e.g., 100%Markdown/P riceDiscount(...))

8. The names of all customers whose address doesnt match the address of a store theyve shopped at

9. The card numbers of customers who have bought all products (be careful

that you dont require them to buy everything on the same day, from the

same store, with the same markdown)