A student notices that the image produced from a large concave mirror of a distant skyscraper of height $h_s=145m$ is inverted and the magnitude of the height is $|h_i|=1\mathrm{.}16$ m tall. The image is located $d_i=189cm$ in front of the mirror.

Part $($a$)$

Write an expression for the distance between the mirror and the skyscraper, $d_s.$

$d_s=$

Part $($b$)$

What is the distance between the mirror and the skyscraper in meters?

Part $($c$)$

What is the focal length of the mirror, $f,$ in centimeters?