Diffraction Questions

If $I_0$ is the intensity of the principal maximum in the single slit diffraction pattern, then what will be its intensity when the slit width is doubled?

In an experiment, electrons pass through a narrow slit of width ‘$d$ ’. They are detected on a screen at a distance ‘$D$ ’. Which graph correctly represents the number of electrons $N$ detected as a function of the detector position $y$ ($y=0$ corresponds to the middle of the slit)?