What is the ratio of intensity of the second order (m=2) fringe to the intensity of the central fringe?

An interference/diffraction pattern is produced by a two slit system where the slits are 50. 0 um (micrometers), the slit is 0. 200 mm, and the wavelength is 550nm.

What is the ratio of the intensity of the second order (m=2) fringe to the intensity of the central fringe?

Find the linear distance on the screen from the central bright fringe?

Light with a wavelength of 590 nm passes through a slit 7. 00 µm wide and falls on a screen 1. 60 m away. Find the linear distance on the screen from the central bright fringe to the fourth dark fringe on either side.