A Very Light Ideal Spring Stretches By $21.0 \mathrm {~cm}$ When It Is Used to Hang a 135-N Object

A very light ideal spring stretches by $21.0 \mathrm {~cm}$ when it is used to hang a 135-N object. What is the weight of a piece of electronic equipment that would stretch the spring by $44.9 \mathrm {~cm}$ if you hung the equipment using the spring?

A) 289 N
B) 63 N
C) 176 N
D) 405 N