CREATE TABLE table_68741 ("Region served" TEXT, "City" TEXT, "Channels  (  Analog / Digital  ) " TEXT, "First air date" TEXT, "ERP  ( Analog/ Digital ) " TEXT, "HAAT  ( Analog/ Digital )  1" TEXT, "Transmitter Location" TEXT)

What is the ERP for the Rockhampton region?
SELECT "ERP (Analog/ Digital)" FROM table_68741 WHERE "Region served" = 'rockhampton'
SELECT "ERP (Analog/ Digital)" FROM "table_68741" WHERE "Region served" = 'rockhampton'