Monochromatic 545-nm light is incident on a 15- m-wide slit. If the diffraction pattern is cast on a screen 510 mm from the slit,

Monochromatic 545-nm light is incident on a 15- μ m-wide slit. If the diffraction pattern is cast on a screen 510 mm from the slit, what is the linear distance from the center of the pattern to the n = 4 dark fringe?