Q$5.$ Consider the following $3$D points:

$Q_1=([0],[0],[0]),Q_2=([1],[0],[0]),R_1=([0],[0],[1]),R_2=([1],[0],[1])$

that belong to two parallel $3$D lines $Q$ and $R($as shown in the figure below$).$

Compute the $2D$ image points $q_1,q_2,r_1,r_2$ that are observed with a camera with perspective

projection matrix

$M=([1,7,9,0\mathrm{.}3],[2,6,3,0\mathrm{.}2],[4,2,1,0\mathrm{.}1])$

Compute the $2$D intersection point $s$ between both lines in the image plane.