$(22\%)$ Problem $4$: Visiting the Palmer Museum of Art, you are standing in front of a Ukiyo$-$e Japanese woodblock print and are inspired to do a little physics experiment in the gallery. You form your index finger and your thumb into a circle that's about $3cm$ in $($inner$)$ diameter. You hold it $25cm$ away from your left eye $($your right eye is closed$).$ The print on the wall is $75cm$ from your hand forming the circle.

Problem figure is from the Palmer Museum of Art Collection & website: Ando Hiroshige, Fujikawa, a Village in the Mountains Also Called Miyajiyama $($Fujikawa sanchu no sato besumei Miyajiyama$),$ No$.38$ from the series The Fifty$-$three Famous Views $[$of the Tokaido$]($Gojusan tsugi meisho zue$),1855,$ woodblock print $($detail$).$ Gift of Dr$.$ William E$.$ Harkins, $75\mathrm{.}87.$ Palmer Museum of Art, Penn State. Used with permission.