Question 3: (20 marks) A- Based on the three tables and the attributes below: (5 marks) Answer the question for Requirement A and write SQL commands for Requirements b. Required: a. What are the foreign keys in the Sales table? (1 marks) b. How many sales transactions were made in March, 2017? (4 marks) Inventory V InventoryID Name BeverageType Caffeinated Flavored Purchase Price Salesitems InvoiceID InventoryID Quantity UnitPrice Sales V InvoiceID InvoiceDate Order Date Customer Employee Customer Po