Question $8$: $12$ Marks

$(8\mathrm{.}1)$ 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 $B=$

$(-1,2,-1).$

$8\mathrm{.}3-5x+y-2z=3$ and

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