A $60-$Hz$,$ four$-$pole, three$-$phase synchronous motor operated as a servo drive has thefollowing parameters: RS $=4,$ LS $=8$ mH$.$ Within the constant$-$torque region at rated flux:kT $=0\mathrm{.}343$ N$-$m$/$Apeak$,$ kE $=0\mathrm{.}229$ Vpeak$/$rad$/$s$.$ The motor produces a sinusoidal excitationor back emf efa. If the motor is operating at a speed of $1500$ rpm and a load torque of $0\mathrm{.}574$N$-$m$,$ calculate$($a$)$the stator current, the excitation voltage, the torque angle, the stator voltage and thepower factor, and $($b$)$ the three$-$phase stator currents when the rotor position is $60$ degrees.