A cylindrical bar with 1-in diameter fits tightly in a circular hole in a 5 in this plate. The shear modulus of the material is G = 5.6E6 psi. A 12,00-in-lb axial torque is applied at the left end of the bar. The distributed torque exerted on the bar by the plate is given by the equation where co is a constant and x is the axial position in inches measured from the left side of the plate. Determine the constant co and the magnitude of the maximum shear stress in the bar at x = 2 in