A $200-$km$,230-$kV$,60-$Hz three$-$phase line has a positive$-$sequence series impedance z $=0\mathrm{.}08+$ j$0\mathrm{.}48$ ohm$/$km and a positive sequence shunt admittance y $=$ j$3\mathrm{.}33$x$10-6$ mho$/$km$.$ At full load, the line delivers $300$ MW at $0\mathrm{.}99$ p$.$f$.$ lagging and at $220$ kV$.$ Using the nominal circuit, calculate $($a$)$ the ABCD parameters, $($b$)$ the sending$-$end voltage and current, and $($c$)$ the percent voltage regulation. Repeat using the short and long line models and compare your results. Problem be solved in per unit or using Volts and Amps