Hey can you please explain these questions? (Related with the light)

Thanks in advance

1) (1 pt) A light wave has magnetic field in the +z direction (out of the page on a standard xy coordinate system). Its electric field points in the +x direction. Which way is it traveling? a. +x (Right) b. -x (Left) c. +y (Up) d. -y (Down) e. +z (Out of the page) f. -z (Into the page) 2) (1 pt) Which of the following is always true of a light wave? i. The electric field is always perpendicular to the magnetic field ii. The electric field is always perpendicular to the direction the wave is traveling a. i only b. ii only c. Both i and ii d. Neither i nor ii 3) (2 pts) Light which is initially polarized in the x direction with an intensity 1000 W/m^2 is incident on a series of three polarizers. The first has polarization axis along the x axis, the second 35 degrees from the x axis, and the third along the y axis. i. The intensity after passing 00 through the first polarizer (the filter filter filter meter one along the x axis) is X 35 deg y registers from x some light A. 1000 W/m^2 B. 671 W/m^2 C. 500 W/m^2 D. 329 W/m^2 E. 0 i. If your answer to the previous question is called I, the intensity of the light after emerging from the final polarizer can be calculated as A. I * cos 35 * cos-35 B. I * cos235 * cos255 C. I * cos255 * cos255 D. I * cos 35 0