For the shaft/gear assembly shown in Figure 1, the shaft is driven by Gear at C. Gears at B and D are driven by the shaft. It turns freely at A and E. T - 450 N.m, T1=275 N.m, T,= 175 N.m, d = 30 mm, Lac = 500 mm, L=400 mm, and G= 80 GPa. Determine the maximum shear stress and the angle of twist $7 between gears B and D. T -LBC 72 73 CD