In computer graphics and perspective drawing, we need to represent objects seen by the eye in space as images on a two$-$dimensional plane. Suppose that the eye is at E$($X$0,0,0)$ as shown here and that we want to represent a point P$1(*1\mathrm{.}91\mathrm{.}21)$ as a point on the yz$-$plane. We do this by projecting P$,$ onto the plane with a ray from E$.$ The point P$,$ will be portrayed as the point P$(0,$y$,$z$).$ The problem for us as graphics designers is to find y and z given E and P$.$ Complete parts $($a$)$ and $($b$).$ PO$.$y$.$ P$261,21,21)$ ol$/$ b$.$ Test the formulas obtained for y and z in part $($a$)$ by investigating their behavior at x$1=0$ and X$1+$ Xo and by seeing what happens as Xo$+00.$ What do you find? Start with X$1=0.$ Select the correct choice below and fill in any answer boxes within your choice.