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 STUDENT (LName VARCHAR, Sex VARCHAR, Age VARCHAR)
### Question:
Find the last name of female (sex is F) students in the descending order of age.
### Answer:
SELECT LName FROM STUDENT WHERE Sex = "F" ORDER BY Age DESC