9,10,11 please on paper

9. Suppose we have the following lines: L : x =-3+3t, y=1+t, z=-4+41 L, : x=-1+s, y=3-2s, 2=1+2s Determine if the lines are skew. If they lines are skew, find the distance between the lines. 10. Let A= (2, 3, 1) and B= (4, -1, 2) and C =(6, 2, 3). Find the equation of the line passing through C that intersects AB is perpendicular to AB . 11. Find the equation of the plane passing through (2, -1,4) and is perpendicular to the planes 2x - y +3z =0 ; x+2y=4