What would you see in your viewing screen for seven slit? Draw it

When red light ( ?=650 nm) is incident on a single slit, the central bright spot has a width of 9.00 cm. If the screen is 3.55 m distant from the slit, calculate the slit width ?. At which point does Person 1 perceive the image of Person 2 to be located?

Light with a single wavelength of 595 nm is directed upon two thin slits separated by a distance of 0.8 mm. If the spatial separation of central maxima and the 5th order maxima is measured to be 3.68 mm. What distance away is the screen in meters?

Suppose you shine a laser on a single slit. The light from the single slit propagates to a screen that is far away compared to the slit width. Will the spacing between minima on the screen increase, decrease, or stay the same if the following variables are changed: Slit width is increased? The distance from the flit to the screen is increased? The laser is switched from red to blue? (i.e. wavelength increased) The system is placed in a medium of glass, rather than air? The slit is rotated?