equation of a line through points, perpendicular to a line

[mathstresser]

Is the line through (4,1,-1) and (2,5,3) parallel to the line through (-3,2,0) and (5,1,4)?

I found the V1(vector 1) between the first two points to be <-2,4,4> and V2 (between the last two points) to be <8,-1,4>

I thought that if I found the second vector, I could then find the normal line, and then figure out the equation of the line that thoes through the first two points and is parallel to the normal line.

But, I don't know how to find the normal line with the form it's in. Plus, even when I do find the normal line, I don't know how to find the line that is parallel to it and that goes through the first two points.

 

[mathstresser]

It should read, "Is the line through (4,1,-1) and (2,5,3) perpendicular to the line through (-3,2,0) and (5,1,4)? "