A 300km three phase double circuit 330kV transmission line is constructed on steel lattice towers. The conductor is a quad bundle of "Silicon". The bundle spacing is 450mm. The conductor is initially tensioned to 18% of NBL (Nominal Braking Load) at 15degreeC. The span is 250m. The insulation level is U = 362kVrms: specified switching impulse withstand voltage, SSIWV = 850kVrms (Longitudinal and phase to earth): specified lightning impulse withstand voltage, SLIWV = 1050kVp. The conductor bundle centre co-ordinates (x, y) = (distance from centre line of the towers, height above ground) are: Circuit 1: Phase R - (5m, 20m): Phase S - (6m, 27m): Phase T - (5m, 34m): Circuit 2: Phase S - (-5m, 20m): Phase T - (-6m, 27m): Phase R - (-5m, 34m): Earth Wire 1 (-3.5m, 43m): Earth Wire 2 (3.5m, 43m) (a) Draw the placement of the conductors and determine the shielding angle provided to the phases by the earth wires. (b) What is the conductor sag for the initial stringing condition