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 (enrollment_08_09 INTEGER, previous_counference VARCHAR, ihsaa_class VARCHAR)
### Question:
What is the average enrollment 08=09, for the team that had a previous conference of lake and IHSAA class of 3A?
### Answer:
SELECT AVG(enrollment_08_09) FROM table_name_28 WHERE previous_counference = "lake" AND ihsaa_class = "3a"