4) A 41 kg beam is placed between two buildings that are 3.5 m apart. A rope is tied to the beam 1.1 m from the left end of the beam. A 103 kg person is slowly climbing up the rope. a) If your mass is 88 kg and you stand 0.52 m from the left end of the beam, what are the contact forces of the two buildings acting on the beam? b) Is it possible to stand somewhere on the beam so that the contact forces are the same? If so, where