A 5.0-m-long ladder has mass 12.5 kg and is leáning against a frictionless wall, making a 66⁰ angle with the horizontal. If the coelficant of friction between the ladder and ground is 0.42 . what is the mass of the heaviast person wito can salely ascond to the fop of the lagder? (The centor of mass of the Ladder is at is center) Express your answer using two significant figures.