Help me please

Activity 2 | Double Slit Interference (Adapted from PhET Colorado?) . In the pictures on the last page, the rays are emitted in all directions from the slits, but let's concentrate on the rays that are emitted in a direction 0 toward a distant screen (0 measured from the normal to the barrier). One of these rays has further to travel to reach the screen, and the path difference is given by d sin d. K to screen a. Predict the brightness on the distant screen if the path difference is exactly d sin 0 one wavelength ). (or any integer number of wavelengths)? Explain your reasoning. b. Predict the brightness if the path difference is 2/2, 32/2, or 5)/2, etc.? Which equation below tells you the angles (0) at which you will see bright spots and which one tells you the angles (0) for dark spots? Circle one: Bright or Dark d sin 8 = ma d sin e = (m + ;). m =0, #1, +2.. Circle one: Bright or Dark c. What ideas from part le (page 3) would you keep and which would you revise? d. How do the equations above support your predictions of brightness and the pattern shown on the right