I have translated the question in the text box i wrote. I need help with question b

Glass spheres are often used as lenses to focus laser beams into optical fibers. They are also used in endoscopy, barcode scanning, and various sensors Assume that the sphere\'s radius R is mm and it has a refractive index n of s

bCalculate the magnification of the glass sphere. How large would the image of the sun be if the sphere is used as a lens? Compare with the typical thickness of human hair