A 3-phase induction motor, at rated voltage and frequency, has a starting torque of 140 percent and a maximum torque of 210 percent of full-load torque. Neglect stator resistance and rotational losses and assume constant rotor resistance. Determine:
a. The slip at full load.
b. The slip at maximum torque.
c. The rotor current at starting as a percent of full-load rotor current.