A sinusoidal wave on a transmission line is specified by voltage and current in phasor form: Vs$($z$)=$ V$0$ e z e jz and Is$($z$)=$ I$0$ e z e jz e j where V$0$ and I$0$ are both real. $($a$)$ In which direction does this wave propagate and why? $($b$)$ It is found that $=0,$ Z$0=50,$ and the wave velocity is v p $=2\mathrm{.}5108$ m$/$s$,$ with $=108$ s $1.$ Evaluate R$,$ G$,$ L$,$ C$,$ $,$ and $.$