1/ write the scalar equations of the line parallel to theintersection of the pla

1/ write the scalar equations of the line parallel to theintersection of the planes 3x+y+z=5 x-2y+3z=1 and passing throughthe points (421). 2/ given that A and B are parallel to the yzplane that |A|=2 |B|=4 and A.B=0 what can you say about AxB?3/if uv and w are mutually perpendicular unit vectors and u xv=w show that v= w x u and u= v x w.