Which quantum numbers must be the same for the orbitals that they designate to be degenerate in a many-electron system?

Need in all of themmm only answer if you know pls

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up