Instruct: Name the average population hervey bay with population maryborough more than 11,415 and population region total less than 48,308 and population tiaro less than 2,066 and population woocoo of 491
Output: SELECT AVG Population (Hervey Bay) FROM table WHERE Population (Maryborough) > 11,415 AND Population (Region total) < 48,308 AND Population (Tiaro) < 2,066 AND Population (Woocoo) = 491