A sheet of paper is attached to the door of your refrigerator by a magnet. The coefficient of static friction between the fridge door and the paper is 1. 5, and between the paper and the magnet is 0. 6. The mass of the paper is 3 gram, the mass of the magnet is 11gram. What is the magnitude of the minimum force with which the magnet must be attracted to the fridge, so the note sticks?