In a dielectric medium $($s $=9$s$0,,=,$J$,$ a plane wave with H $=0\mathrm{.}2$ cos$(109$ t $-$ kx $-$ kVsz$)$ay Alm is incident on an air boundary at z $=0.$ Find $($a$)$ Or and $(\}$t $($b$)$ k $($ c$)$ The wavelength in the dielectric and in air $($d$)$ The incident E $($ e$)$ The transmitted and reflected E $($f$)$ The Brewster angle