The width of single slit diffraction fringes varies

The width of the diffraction fringe varies :

The fringe width in single slit diffraction pattern is proportional to

How will the patterns in the single slit diffraction change if the width of the slit is decreased?

Frist diffraction minima due to of a single slit diffraction is at theta = 30^(@) for a light of wavelength 6000 Å . The width of slits is

Angular width of central maxima of a single slit diffraction pattern is independent of

Show that the width of central maximum is twice that of a secondary maximum and if the width of slit is increased, the width of diffraction fringes gets diminished.