A 3-phase, 4160 V, 50-Hz, 660 HP, 8-pole, Y-connected induction motor has its per-phase equivalent circuit when referred to stator side as shown below. The total friction, windage, and core losses can be assumed to be constant at 1000 W. For a per-unit slip of 0.015, when the motor is operated at rated voltage and frequency; (a) Sketch and find the value of the components of the per-phase Thevenin's equivalent circuit of an Induction motor (b) What are the starting current and the starting torque of this motor? (e) Find the slip at pull-out torque. (d) Find the pull-out torque of this motor. (e) Find the value of the external resistance required in each phase of the rotor circuit such that the maximum torque occurs at starting.