3
Q 2. (a) Determine whether the lines
\[
\begin{array}{lll}
L_{1}: \quad x=2+3 u_{1} & y=3 t_{1}, & z=1-t \\
L_{2}: & x=4+2 s_{1}, & y=-3+3 s, \\
z=-2 s
\end{array}
\]
are parallel, nkew, of intersecting. If they internect, find the paint of intersection.