$10\mathrm{.}60$ A uniform plane wave in air is normally incident on an infinite lossless dielectric material$$ occupying z $0$ and having e $53$eo and m $5$ mo$.$ If the incident wave is Ei $510$ cos$1$vt $2$ z$2$ay V$/$m$,$ find $($a$)$ l and v of the wave in air and the transmitted wave in the dielectric medium $($b$)$ The incident Hi field $($c$)$ G and t $($d$)$ The total electric field and the time$-$average power in both regions