$8.$ A mass m $=5\mathrm{.}0$ kg is suspended by a rope at the end of a uniform horizontal pole of length L $=8\mathrm{.}0$ m and mass M $=10$ kg$.$ The pole is attached at one end to a vertical wall by a hinge. A cable affixed to the wall and connected to the pole a distance d $=4\mathrm{.}0$ m from the wall also helps to support the pole. The cable makes an angle of $60$ with respect to the wall. The normal force that the wall exerts on the pole is A$)470$ N$.$ B$)160$ N$.$ C$)340$ N$.$ D$)200$ N$.$