Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_82 (quantity INTEGER, designation VARCHAR)
### Question:
Which Quantity has a Designation of type 4?
### Answer:
SELECT AVG(quantity) FROM table_name_82 WHERE designation = "type 4"