Please show all work for better understanding of course materials. Thank you!The figure shows the interference pattern on a screen 1.0 behind an 890 diffraction grating. Please see diagram attached below.A. What is the wavelength of the light?Express your answer using two significant figures; Please express answers in nm, thank you.Problemd 23.72A slide projector needs to create a 98.0 -high image of a 2.10 -tall slide. The screen is 308 from the slide.Part A. What focal length does the lens need? Assume that it is a thin lens. Express answer in cmPart B. How far should you place the lens from the slide? Express answer in cm