I just need help with part E!

Part A A 40-year-old optometry patient focuses on a 6.50 cm -tall photograph at his near point. (See the table.) We can model his eye as a sphere 2.50 cm in diameter, What is the effective focal length of his eye when he focuses on the photo? with a thin lens at the front and the retina at the rear. (Figure 1) f = 2.24 cm Submit Previous Answers Correct Part B Figure