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_28 (test_standard VARCHAR, usage VARCHAR, class VARCHAR)
### Question:
Which Test Standard has a Usage of secondary filters, and a Class of f5? Question 4
### Answer:
SELECT test_standard FROM table_name_28 WHERE usage = "secondary filters" AND class = "f5"