In this question please explain your reasons for each step of your solution after finishing please use any application to make Pdf with good resolution $($In Cam scanner you can use magic mode for this purpose$)$

Q$1.$ In the Pi model of the Medium$-$Length Line the radius of the conductors of the lines are approximately $r=r^{\text{'}}$ and $f=50Hz,$ calculate the value of BC in the transmission matrix $T=\left[\begin{array}{cc}A& B\\ C& D\end{array}\right].($ NOTE: Line is without loss and length of it is $100$ km and $=3).$