A plane polarized EM wave propagates through a polymer. Such waves obey a similar wave equation to that found for free space. The wave has a magnetic field vector, ??=[(?1.2??)?sin(??y+??t)] ?T, with frequency ??=7.61×10^(14) Hz and wave number ??=1.61× 10^7 ???1. Find the speed of the wave, the electric field vector, and the direction of propagation of the wave.