CREATE TABLE table_name_4 (class VARCHAR, frequency_mhz VARCHAR, city_of_license VARCHAR)

What class has a MHZ frequency under 103.1 licensed in morro bay, california?
SELECT class FROM table_name_4 WHERE frequency_mhz < 103.1 AND city_of_license = "morro bay, california"
SELECT "class" FROM "table_name_4" WHERE "city_of_license" = "morro bay, california" AND "frequency_mhz" < 103.1