A telescope is 8 inches in diameter, with focal length of 32…

A telescope is 8 inches in diameter, with focal length of 3200mm equipped with 3 eyepieces, diameter 1.25 inches with 32mm focal length, diameter 1.25 inches with 20mm focal length and diameter 2 inches with 10 mm focal length. (a) Which eyepiece yield the greatest magnification? explain your answer.  (b) What is the resulting magnification with the eyepiece you have selected in part a? Show your calculation.