Where do you find the fuse for the radio on a 2000 Mercury Mountaineer?

Its 29 but if your luck is like mine --- I spent three days trying to figure out which fuse was bad only for someone i didnt know to walk down the road (see me messin with the truck) and stops in to see if I need help. Of COURSE it only took him 2.5 milli-seconds to figure out it was the whole stinkin radio. GOOD LUCK!