A $460-$V$,4-$pole, $50-$hp$,60-$Hz$,$ Y$-$connected, three$-$phase induction motor develops its full$-$load induced torque at $3\mathrm{.}8\%$ slip when operating at $60$ Hz and $460$ V$.$ The per$-$phase circuit model impedances of the motor are:

R$1=0\mathrm{.}33$ Ohms Xm$=30\mathrm{.}0$ Ohms

X$1=0\mathrm{.}42$ Ohms X$2=0\mathrm{.}42$ Ohms

Mechanical, core, and stray losses may be neglected in this problem.

Find the value of the rotor resistance.

Find Tmax, SmaxT, and the rotor speed at maximum torque for this motor.

Find the starting torque of this motor

What starting code letter should be assigned to this motor?