CREATE TABLE table_17646 ("Branding" TEXT, "Callsign" TEXT, "Ch. #" TEXT, "Power  ( kW ) " TEXT, "Station Type" TEXT, "Coverage  ( Transmitter site ) " TEXT)

What is the coverage of relay 5kw of dyfj-tv?
SELECT "Coverage (Transmitter site)" FROM table_17646 WHERE "Station Type" = 'Relay' AND "Power (kW)" = '5kW' AND "Callsign" = 'DYFJ-TV'
SELECT "Coverage (Transmitter site)" FROM "table_17646" WHERE "Callsign" = 'DYFJ-TV' AND "Power (kW)" = '5kW' AND "Station Type" = 'Relay'