In three-space, find the intersection point of the two lines: [x,y,z]=[3,4,0]+t[1,1,2]
and [x,y,z]=[-1,4,-20]+s[0,-1,3] :
a) (-1,0,-8)
b) (2,0,-3)
c) (-4,-5,-8)
d) (-4,-5,1)