A synchronous motor is running at 70% rated load torque when the torque angle is 20°. Determine its pull-out torque T_max (steady-state stability limit torque) in percentage of the rated torque. If the load torque is increased to 100% rated torque in one step, determine the worst-case transient peak value of the torque angle. Ignore the damping bar contribution for a conservative estimate and assume the torque versus δ relation approximately linear in the operating range.