A motor is used to drive a hoist. Motor characteristics are given by Quadrants I, II and IV: T=200 -0.2N, N-m Quadrants II, III and IV; 7=-200-0.2N, N-m where N is the speed in rpm. When hoist is loaded, the net load torque 7, = 100, N-m and when it is unloaded, net load torque T-80, N-m. Obtain the equilibrium speeds for operation in all the four quadrants.