Draw the chain of tables for each task before you write it. The link icons in the table tabs show the foreign keys.

1. Every order item: the order id, the product name, then the quantity.
2. Every order item with the customer who bought it: the customer's name, then the product name.
3. The names of the products that Ava Chen bought.
4. How many different customers bought the Kraken Plush?
5. Every order item with its product and category: the order id, the product name, then the category name. The item with no category must be in the result.