The shop's orders are in two models:

• Relational: orders, order_items, products and customers, linked by keys.
• Documents: order_docs, one JSON document per order, with the customer and the items embedded.

1. From the relational tables, list the product name and the quantity of every item in order 101.
2. From order_docs, list the product and the qty of every item in order 107, as text.
3. In how many documents of order_docs does the name Ava Chen appear?
4. Ava Chen changes her name to Ava Li. Change it in both models: in customers and in every document.

To change one value inside a document, use jsonb_set(document, path, new_value). It returns the document with the value at path replaced. The path is a list of keys, the new value is JSON. For example, to change the status of order 115:

UPDATE order_docs
SET doc = jsonb_set(doc, '{status}', '"shipped"')
WHERE id = 115;

5. Which model stores Ava's name only once? Answer relational or document.