$3137.$ Parallel, intersecting, or skew lines Determine whether the following pairs of lines are parallel, intersect at a single point, or are skew. If the lines are parallel, determine whether they are the same line $($and thus intersect at all points$).$ If the lines intersect at a single point, determine the point of intersection. $33.$ x $=4,$ y $=6-$ t$,$ z $=1+$ t and x $=-3-7$s$,$ y $=1+4$s$,$ z $=4-$ s