Please do not copy the other solutions, they do not answer the correct question, and you will be downvoted.

$8\mathrm{.}3$ The per$-$unit kVA capability and steady$-$state stability curves at rated terminal voltage for a $50$ MVA, $13\mathrm{.}2$ kV$,60$ Hz generator are shown in Figure P$8\mathrm{.}3.$ The CTs used are $3000$:$5.$ For loss$-$of$-$excitation protection, do the following:

a$.$ Translate the steady$-$state stability limit to a per$-$unit R$$X diagram for a terminal voltage of $1\mathrm{.}0$ per unit.

b$.$ Translate the $15$ psi capability curve to a per$-$unit R$$X diagram for a terminal voltage of $1\mathrm{.}0$ per unit.

c$.$ With these limits plotted on an R$$X diagram, draw a distance relay offset mho circle to provide protection for low or loss of excitation on this machine.

d$.$ For the relay mho circle selected in part c$,$ determine the per$-$unit offset $($distance of the circle center from the R$$X origin$)$ and the per$-$unit circle radius. Translate these values to relay ohms for setting a loss$-$of$-$excitation relay, Rc $=3000$:$5.$ Rv $=120.$

I will upvote good solutions.