A gymnаst with mаss 46.0 kg stаnds оn the end оf a unifоrm balance beam as shown in the figure. The beam is 4.70 m long and has a mass of 240 kg (excluding the mass of the two supports). Each support is 0.530 m from its end of the beam. In unit-vector notation, what are the forces on the beam due to support 1 ?