Youngs Double Slit Experiment

In Young's double slit experiment, one of the slits is wider than the other, so that the amplitude of light from one slit is double of that from the other slit. If I_m is the maximum intensity, what is the resultant intensity when they interfere at phase difference Q?

In Young's double slit experiment, using a monochromatic light of wavelength λ, the intensity of light at a point on the screen where path difference is is K units. Then the intensity of light at a point where path difference is is