i. [5 pts] Suppose a rectangle of width $L$ is moving along the X axis. How does its width $1$ on the image plan change w.rt. its distance $d$ to the origin? Recall that, under perspective projection a point $(X,Y,z)$ in 3D space maps to $(f\frac{X}{z}, f\frac{Y}{Z})$ in the image, where $f$ is the distance of the image plane from the pinhole