3) For the following system, the rod is uniform and weighs 1200N and the sign weighs 2000N. The diameter of the cylindrical supporting steel cable is 4.00cm. a) Determine the tension needed in the steel cable to keep the system in equilibrium. b) Determine the horizontal and vertical forces on the rod due to the pivot. c) Determine the fractional change in the steel cable. Supporting Cable, with tension FT 3/4L e 25 0 L x=90 A sign B=65 Pivot