The diffraction pattern from a single slit is viewed on a screen. Using blue light, the width

Question:

The diffraction pattern from a single slit is viewed on a screen. Using blue light, the width of the central maximum is 2.0 cm.
(a) Would the central maximum be narrower or wider if red light is used instead?
(b) If the blue light has wavelength 0.43 μ m and the red light has wavelength 0.70 μ m, what is the width of the central maximum when red light is used?