A 35-Mm Digital Camera Using a Standard 50

Essay

A 35-mm digital camera using a standard 50.0 mm lens is focused on a 1.80 m tall person
who is standing 3.25 m from the lens. You now refocus the camera on a 15.0 cm tall flower
that is 75.0 cm from the lens.
(a) In refocusing, by how much did you move the lens? Did you move it toward the film
or away from it?
(b) What is the height of the flower's image on the CCD sensor?