QUESTION 2: (33%) Shaft BC is hollow with inner and outer diameters of 90 mm and 120 mm, respectively. Shafts AB and CD are solid and of diameter d. For the loading shown, determine, (a) the maximum and minimum shearing stress in shaft BC, (b) the required diameter d of shafts AB and CD, if the allowable shearing stress in these shafts is 65 MPa. 0.9 m COCO 190 mm T = 6 kN-m B TB = 14 kN -m 0.7 m 0.5m D Tc = 26 kN-m TD=6kN m