CREATE TABLE table_name_28 (enrollment_08_09 NUMBER, previous_counference VARCHAR2, ihsaa_class VARCHAR2)

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