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

Thanks in advance

1) (1 pt) It is found that when a polarizer is placed in front of a light wave, it emerges with intensity 1 W/m^2. When a second polarizer is added after the first one, the light still emerges with the same intensity 1 W/m^2. What can we conclude? a. The light is unpolarized b. The light is randomly polarized c. The two polarizers are aligned d. The two polarizers are crossed 2) (1 pt) The key difference between visible forms of light and invisible forms of light is a. Its wavelength b. The direction of the electric field vector c. Whether the electric field is oscillating or not d. Whether it contains a magnetic field e. Whether it contains an electric field 3) (2 pts) Some polarized light has an electric field amplitude of 2700 V/m. After it passes through a polarizer, its new electric field amplitude is 1000 V/m. i. The angle (in degrees) between the light's polarization and the polarizer's axis was A. 22 B. 37 C. 53 D. 68 E. 82 ii. The intensity of the light (in W/m^2) after passing through the polarizer was A. 0.042 B. 0.63 C. 500 D. 1000 E. 1330