Question $8(12$ marks$)$

$8\%$ Find parametric equations $of$ the line that passes

through the point $P=(1,0,-1)$ and $is$ parallel

$to$ the vector vec$(n)=($:$2,1,-1$:$).$

$8\mathrm{.}2.$ Find parametric equations $of$ the line that passes

through the points $A=(1,2,-1)$ and $B=(-1,2,-1)$

$8\mathrm{.}3.$ Find the parametric equations for the line $of$

intersection $of$ the planes $-5x+y-2z=3$ and

$2x-3y+5z=-7.$